With reports flying around that he would be named after their fathers, it turns out that they've gone a completely different way with the moniker - choosing the very classic Theodore for their son.
Taking to Instagram, former Made In Chelsea star Spencer announced the news, 'Our son Theodore is already nearly two weeks old!! Time really does fly when youāre having the time of your life! Having a child with my wife and soulmate is nothing short of a dream come true. Feeling very lucky and absolutely LOVING fatherhood!!!'
Vogue, who was previously married to Westlife's Brian McFadden, also posted the adorable snap, writing, 'My whole world has changed with the arrival of our beautiful boy Theodore. The last two weeks have been the best of my life.
'I am loving every minute of being a mother, even the very sleepy wake up calls at night. Spencer and I have never felt love like it, Theodore you are our world...ā¤ļø' sic
Swipe through to see which other celebrities have welcomed babies this year...
Kim Kardashian and Kanye West
Kim Kardashian and her husband Kanye West welcomed their third child via a surrogate in January. The couple later confirmed they've called her Chicago West.
Spencer Matthews and Vogue Williams announce their baby's name with adorable pic
2 of 35
Jennie McAlpine and Chris Farr
Coronation Street actress Jennie McAlpine welcomed her second child into the world in October, a baby girl called Hilda.
Kim Kardashian and Kanye West
Kim Kardashian and her husband Kanye West welcomed their third child via a surrogate in January. The couple later confirmed they've called her Chicago West.
The Duke and Duchess of Cambridge
The Duke and Duchess of Cambridge welcomed a baby boy at 11.01am on Monday 23rd April. They decided to call him Prince Louis.
Peter Crouch and Abbey Clancy
Footballer Peter Crouch and model Abbey Clancy welcomed their third child into the world in January, a baby boy called Johnny.
Natasha Bedingfield
'Unwritten' singer Natasha Bedingfield welcomed her first child into the world in January.
Ore and Portia Oduba
Former Strictly Come Dancing star Ore Oduba and his wife Portia welcomed their first child, a baby boy called Roman.
Gaz Beadle and Emma McVey
Former Geordie Shore star Gaz Beadle became a dad for the first time when his girlfriend Emma McVey welcomed a baby boy called Chester Raymond in January.
Danny and Georgia Jones
McFly star Danny Jones and his wife Georgia welcomed their first child, a baby boy called Cooper Alf in January.
Heidi Range and Alex Patakis
Former Sugababes singer Heidi Range and her husband Alex Partakis welcomed a baby girl into the world called Aurelia Honey Partakis.
Aston Merrygold and Sarah Richards
Former JLS singer and 2017 Strictly Come Dancing contestant Aston Merrygold and his partner Sarah Richards welcomed a baby boy called Grayson Jax.
Kylie Jenner and Travis Scott
After keeping her pregnancy a 'secret' for nine months, Kylie Jenner revealed she welcomed a baby girl called Stormi with her boyfriend Travis Scott on 1st February.
Coleen and Wayne Rooney
After a turbulent 2017, Coleen and Wayne Rooney welcomed their fourth child in February, a baby boy called Cass Mac.
Adam Levine and Behati Prinsloo
Maroon 5 singer Adam Levine and his wife Behati Prinsloo welcomed their second child into the world in February 2018. The couple welcomed a baby girl called Gio Grace.
Robin Thicke and April Love Geary
'Blurred Lines' singer Robin Thicke and his girlfriend April Love Geary welcomed a baby girl called Mia into the world in February.
Zoe and Brendan Cole
Strictly Come Dancing star Brendan Cole and his wife Zoe welcomed a baby boy in March.
Katherine Jenkins and Andrew Levitas
Singer Katherine Jenkins and her husband Andrew Levitas welcomed a baby boy into the world in April, calling him Xander Robert Selwyn Levitas.
Khloe Kardashian and Tristan Thompson
Khloe Kardashian welcomed her first child with her boyfriend Tristan Thompson. The couple called their daughter True Thompson.
Chrissy Teigen and John Legend
Chrissy Teigen and John Legend welcomed their second child together on the 17th May. Chrissy later revealed the baby's name was Miles Theodore Stephens.
Adam and Caroline Thomas
Former Emmerdale actor Adam Thomas and his wife Caroline welcomed their second child into the world in May, a baby girl!
Cher Lloyd
Former** X Factor** star Cher Lloyd welcomed a baby girl called Delilah-Rae with her husband Craig Monk in May.
Zara and Mike Tindall welcomed their second daughter into the world in May.
The news was released in a statement by Buckingham Palace, it read, 'Mrs Michael Tindall was safely delivered of a baby girl on 18th June, at Stroud Maternity Unit. Mr Tindall was present at the birth. The weight of the baby was 9lbs 3oz.
Cat Deeley and Patrick Kielty welcomed their second child in June, a baby boy called James Patrick Kielty.
Jacqueline Jossa and Dan Osborne
EastEnders actress Jacqueline Jossa welcomed her second daughter into the world with her husband Dan Osborne. The couple decided to call her Mia.
Tom Daley and Dustin Lance Black
Tom Daley and Dustin Lance Black announced the birth of their first child with some very cute photos. The baby was named Robbie Ray Black-Daley. Robert is the name of Tom's late dad and also his middle name.
Joe Wicks and his girlfriend Rosie Jones announced their pregnancy in May 2018, and she gave birth to their daughter two months later on 29th July.
Vogue Williams and Spencer Matthews
Newlyweds Vogue Williams and Spencer Matthews welcomed a baby boy into the world on September 5th.
Robbie and Ayda Williams
After keeping the pregnancy a secret, Robbie and Ayda welcomed a baby girl called Collete (Coco) Josephine Williams, via a surrogate in September.
Christine and Frank Lampard
TV presenter Christine Lampard and her husband, former England footballer Frank Lampard, welcomed their first child together in September. The pair welcomed a baby girl into the world called Patricia Charlotte Lampard.
Josie Gibson
Former Big Brother winner Josie Gibson welcomed a baby boy called Reggie-James in September. Her waters broke at her baby shower!
Kate Hudson and Danny Fujikawa
American actress Kate Hudson and her boyfriend Danny Fujikawa welcomed a baby girl into the world in October. The couple decided to call her Rani Rose Hudson.
Pippa Middleton and James Matthews
Pippa Middleton and her husband James Matthews welcomed a baby boy into the world on Monday 15th October, the same day Prince Harry and Meghan Markle confirmed they were expecting.
Hilary Duff and Matthew Koma
Former Disney star Hilary Duff announced that she'd given birth to a baby girl with her boyfriend Matthew Koma, who she's been in a relationship with since January 2017. Taking to Instagram, she wrote, 'Banks Violet Bairā¤ļø this little bit has fully stolen our hearts! She joined our world at home on Thursday afternoon and is absolute magic āØ' sic
Jennie McAlpine and Chris Farr
Coronation Street actress Jennie McAlpine welcomed her second child into the world in October, a baby girl called Hilda.
Kim Kardashian and Kanye West
Kim Kardashian and her husband Kanye West welcomed their third child via a surrogate in January. The couple later confirmed they've called her Chicago West.
The Duke and Duchess of Cambridge
The Duke and Duchess of Cambridge welcomed a baby boy at 11.01am on Monday 23rd April. They decided to call him Prince Louis.
Peter Crouch and Abbey Clancy
Footballer Peter Crouch and model Abbey Clancy welcomed their third child into the world in January, a baby boy called Johnny.
Natasha Bedingfield
'Unwritten' singer Natasha Bedingfield welcomed her first child into the world in January.
Ore and Portia Oduba
Former Strictly Come Dancing star Ore Oduba and his wife Portia welcomed their first child, a baby boy called Roman.
Gaz Beadle and Emma McVey
Former Geordie Shore star Gaz Beadle became a dad for the first time when his girlfriend Emma McVey welcomed a baby boy called Chester Raymond in January.
Danny and Georgia Jones
McFly star Danny Jones and his wife Georgia welcomed their first child, a baby boy called Cooper Alf in January.
Heidi Range and Alex Patakis
Former Sugababes singer Heidi Range and her husband Alex Partakis welcomed a baby girl into the world called Aurelia Honey Partakis.
Aston Merrygold and Sarah Richards
Former JLS singer and 2017 Strictly Come Dancing contestant Aston Merrygold and his partner Sarah Richards welcomed a baby boy called Grayson Jax.
Kylie Jenner and Travis Scott
After keeping her pregnancy a 'secret' for nine months, Kylie Jenner revealed she welcomed a baby girl called Stormi with her boyfriend Travis Scott on 1st February.
Coleen and Wayne Rooney
After a turbulent 2017, Coleen and Wayne Rooney welcomed their fourth child in February, a baby boy called Cass Mac.
Adam Levine and Behati Prinsloo
Maroon 5 singer Adam Levine and his wife Behati Prinsloo welcomed their second child into the world in February 2018. The couple welcomed a baby girl called Gio Grace.
Robin Thicke and April Love Geary
'Blurred Lines' singer Robin Thicke and his girlfriend April Love Geary welcomed a baby girl called Mia into the world in February.
Zoe and Brendan Cole
Strictly Come Dancing star Brendan Cole and his wife Zoe welcomed a baby boy in March.
Katherine Jenkins and Andrew Levitas
Singer Katherine Jenkins and her husband Andrew Levitas welcomed a baby boy into the world in April, calling him Xander Robert Selwyn Levitas.
Khloe Kardashian and Tristan Thompson
Khloe Kardashian welcomed her first child with her boyfriend Tristan Thompson. The couple called their daughter True Thompson.
Chrissy Teigen and John Legend
Chrissy Teigen and John Legend welcomed their second child together on the 17th May. Chrissy later revealed the baby's name was Miles Theodore Stephens.
Adam and Caroline Thomas
Former Emmerdale actor Adam Thomas and his wife Caroline welcomed their second child into the world in May, a baby girl!
Cher Lloyd
Former** X Factor** star Cher Lloyd welcomed a baby girl called Delilah-Rae with her husband Craig Monk in May.
Zara and Mike Tindall welcomed their second daughter into the world in May.
The news was released in a statement by Buckingham Palace, it read, 'Mrs Michael Tindall was safely delivered of a baby girl on 18th June, at Stroud Maternity Unit. Mr Tindall was present at the birth. The weight of the baby was 9lbs 3oz.
Cat Deeley and Patrick Kielty welcomed their second child in June, a baby boy called James Patrick Kielty.
Jacqueline Jossa and Dan Osborne
EastEnders actress Jacqueline Jossa welcomed her second daughter into the world with her husband Dan Osborne. The couple decided to call her Mia.
Tom Daley and Dustin Lance Black
Tom Daley and Dustin Lance Black announced the birth of their first child with some very cute photos. The baby was named Robbie Ray Black-Daley. Robert is the name of Tom's late dad and also his middle name.
Joe Wicks and his girlfriend Rosie Jones announced their pregnancy in May 2018, and she gave birth to their daughter two months later on 29th July.
Vogue Williams and Spencer Matthews
Newlyweds Vogue Williams and Spencer Matthews welcomed a baby boy into the world on September 5th.
Robbie and Ayda Williams
After keeping the pregnancy a secret, Robbie and Ayda welcomed a baby girl called Collete (Coco) Josephine Williams, via a surrogate in September.
Christine and Frank Lampard
TV presenter Christine Lampard and her husband, former England footballer Frank Lampard, welcomed their first child together in September. The pair welcomed a baby girl into the world called Patricia Charlotte Lampard.
Josie Gibson
Former Big Brother winner Josie Gibson welcomed a baby boy called Reggie-James in September. Her waters broke at her baby shower!
Kate Hudson and Danny Fujikawa
American actress Kate Hudson and her boyfriend Danny Fujikawa welcomed a baby girl into the world in October. The couple decided to call her Rani Rose Hudson.
Pippa Middleton and James Matthews
Pippa Middleton and her husband James Matthews welcomed a baby boy into the world on Monday 15th October, the same day Prince Harry and Meghan Markle confirmed they were expecting.
Hilary Duff and Matthew Koma
Former Disney star Hilary Duff announced that she'd given birth to a baby girl with her boyfriend Matthew Koma, who she's been in a relationship with since January 2017. Taking to Instagram, she wrote, 'Banks Violet Bairā¤ļø this little bit has fully stolen our hearts! She joined our world at home on Thursday afternoon and is absolute magic āØ' sic
Jennie McAlpine and Chris Farr
Coronation Street actress Jennie McAlpine welcomed her second child into the world in October, a baby girl called Hilda.
Speaking to HELLO! magazine, the couple - who got married in June this year - opened up about their choice of name, and revealed that the little tyke's middle names are Fredrick and Michael. Fredrick is the name of Vogue's late father, and Michael was the name of Spencer's brother who tragically passed away in 1999.
Vogue said, "We are bursting with love. I honestly feel like he has been here forever, he has just slotted into our lives perfectly. We heard the name Theodore one day and both loved it. We thought we would call him Teddy but since he has been born we have stayed with Theodore rather than shortening it."
Spencer added, "Obviously Vogue did all of the hard work and I have nothing but love and respect for how she dealt with it all in the most admirable way. I could not be more proud of her."
WATCH: The most unique celebrity baby names of 2018
Spencer and Vogue announced the birth of their son via Instagram, revealing that he'd been born on 5th September. Spencer shared a beautiful photo of himself holding his son's hand, writing, 'This morning at 3:55am, we welcomed our son into a quiet London hospital... He is beautiful and healthy. We feel truly blessed. Couldnāt be more proud of @voguewilliams ā¤ļø' sic
Vogue shared a snap of her son's little feet, writing, 'This morning at 3:55am, we welcomed our son into a quiet London hospital... He is beautiful and healthy. We feel truly blessed š' sic
