Now, Katie (who is very private with her three-year-old daughter Belle) has not only showed off her baby girl's face but has also revealed her name.
Posting a snug photo of herself and her daughter, she wrote on Instagram, 'New Year and New addition to our family 👶🏾💖 '.
Hundreds of followers rushed to complement the 34-year-old on her name choice, with one person writing, 'You look stunning Katie, and Penelope is the perfect name for the perfect little bubba 💕 '.
Someone else said, 'Penelope Diane Sutton sounds very distinguished. x Congratulations Katie. xx'.
Another person commented, 'Gorgeous name and beautiful photo, happy new year and a massive congratulations 💜 '.
A further commented, 'Penelope is so adorable and beautiful! Congratulations Katie! x'
Katie has previously revealed her fears on not being able to conceive naturally and has now admitted to OK! magazine that she and her husband were "trying for over a year and a half" to fall pregnant with Penelope.
The wait was definitely worth it as the mum-of-two went on to say, "She’s an angel and so chilled out we sometimes forget she’s there."
She added, "Belle is such a great little helper, bringing me nappies and asking lots of questions".
Congratulations to Katie and her growing family.
Last month we added Katie to the gallery of celebrities who have give birth over the past year, see the full gallery below.
Alexis Ohanian and Serena Williams
Katie Piper reveals her daughter's name and it's VERY traditional
2 of 47
Rachel Adedeji and Jason Finegan
Hollyoaks star Rachel Adedeji and husband Jason Finegan announced the birth of their first child, born on the 21st December.
Alexis Ohanian and Serena Williams
Geri & Christian Horner welcomed a baby boy called Monty
Geri & Christian Horner welcomed a baby boy called Monty
Stephanie Davis & Jeremy McConnell welcomed a baby boy called Caben-Albi
Janet Jackson & Wissam Al Mana welcomed a baby boy called Eissa Al Mana
Janet Jackson & Wissam Al Mana welcomed a baby boy called Eissa Al Mana
Jamie & Rebekah Vardy welcomed a baby boy called Finley Jaiden
Jamie & Rebekah Vardy welcomed a baby boy called Finley Jaiden
Billie Faiers & Greg Shephard welcomed a baby boy
Billie Faiers & Greg Shephard welcomed a baby boy
Alex Jones & Charlie Thomson welcomed a baby boy called Edward
Alex Jones & Charlie Thomson welcomed a baby boy called Edward
Pharrell Williams & Helen Lasichanh welcomed triplets
Pharrell Williams & Helen Lasichanh welcomed triplets
Mel Gibson & Rosalind Ross welcomed a baby boy called Lars Gerard
Katherine Heigl & Josh Kelley welcomed a baby boy called Joshua Jr.
Katherine Heigl & Josh Kelley welcomed a baby boy called Joshua Jr.
Natalie Portman & Ben Millepied welcomed a baby girl called Amalia
Natalie Portman & Ben Millepied welcomed a baby girl called Amalia
Sean Paul & Jodi Stewart Henriques welcomed a baby boy called Levi Blaze
Sean Paul & Jodi Stewart Henriques welcomed a baby boy called Levi Blaze
Rochelle & Marvin Humes welcomed a baby girl called Valentina Raine
Rochelle & Marvin Humes welcomed a baby girl called Valentina Raine
Jessica Ennis-Hill and her husband Andy are expecting a baby
Jessica Ennis-Hill and her husband Andy are expecting a baby
Cheryl and Liam Payne welcomed a baby Bear in March!
Cheryl and Liam Payne welcomed a baby Bear in March!
Five After Midnight's Kieran Alleyne welcomed a baby boy with his ex Sophie
Five After Midnight's Kieran Alleyne welcomed a baby boy with his ex Sophie
Bradley Cooper and Irina Shayk welcomed their first child together
Bradley Cooper and Irina Shayk welcomed their first child together
Benedict Cumberbatch and Sophie Hunter welcomed their second child, a baby boy
Benedict Cumberbatch and Sophie Hunter welcomed their second child, a baby boy
Helen Skelton & Richie Myler welcomed their second child
Helen Skelton & Richie Myler welcomed their second child
Lucy Pargeter and Rudi Coleano welcomed twin girls called Missy Mabel and Betsey Maggie in April
Lucy Pargeter and Rudi Coleano welcomed twin girls called Missy Mabel and Betsey Maggie in April
Ronan Keating and his wife Storm welcomed baby Cooper in May
Ronan Keating and his wife Storm welcomed baby Cooper in May
Former TOWIE star Amy Childs welcomed a baby girl
Ronan Keating and his wife Storm welcomed baby Cooper in May
Alex & Steven Gerrard welcomed their 4th child, a baby boy called Lio
Alex & Steven Gerrard welcomed their 4th child, a baby boy called Lio
UFC star Conor McGregor & girlfriend Dee welcomed a baby boy in May
UFC star Conor McGregor & girlfriend Dee welcomed a baby boy in May
Ciara and Russell Wilson welcomed a baby girl in April
Ciara and Russell Wilson welcomed a baby girl in April
Kieron Richardson and his husband Carl Hyland welcomed twins, Chase and Phoebe in May
Kieron Richardson and his husband Carl Hyland welcomed twins, Chase and Phoebe in May
George and Amal Clooney welcomed twins called Alexander and Ella
George and Amal Clooney welcomed twins called Alexander and Ella
MIC stars Binky & JP welcomed a baby girl in June
MIC stars Binky & JP welcomed a baby girl in June
Beyoncé and Jay-Z welcomed twins Rumy and Sir Carter in June
Jason Statham and Rosie Huntington-Whiteley welcomed their first child together in June, a baby boy called Jack Oscar.
Jason Statham and Rosie Huntington-Whiteley welcomed their first child together in June, a baby boy called Jack Oscar.
Lauren Conrad welcomed her first child with her husband William Tell in July. She welcomed a baby boy called Liam James Tell.
Lauren Conrad welcomed her first child with her husband William Tell in July. She welcomed a baby boy called Liam James Tell.
Harry and Izzy Judd welcomed a baby boy called Kit.
Harry and Izzy Judd welcomed a baby boy called Kit.
Chanelle Hayes welcomed a baby boy
Hollyoaks star Chelsee Healey welcomed a baby girl called Coco.
Rag 'n' Bone Man and girlfriend Beth
Danielle Lloyd welcomed a baby boy called Ronnie
Dame Jessica Ennis-HIll welcomed a baby girl called Olivia
Kian Egan and Jodi Albert
Former Westlife singer Kian Egan and his wife Jodi Albert welcomed their third son into the world and called him Cobi.
Heidi and Spencer Pratt
Reality TV couple Heidi and Spencer Pratt welcomed their first child, a baby boy called Gunner Stone.
Ferne McCann
Ferne McCann welcomed her first child into the world in November. The former TOWIE star called her daughter Sunday.
Jake Hall and Misse Beqiri
Jake Hall and Misse Beqiri welcomed a baby girl called River into the world in November.
Sir Andy Murray and Kim Sears
Scottish Tennis champion Sir Andy Murray and his wife Kim Sears welcomed a baby girl into the world in November. The new arrival is their second daughter.
Cristiano Ronaldo and Georgina Rodriguez
Footballer Cristiano Ronaldo has announced the birth of his fourth child, the first with his girlfriend Georgina Rodriguez on Instagram.
Sam Faiers and Paul Knightley
Former The Only Way Is Essex star Sam Faiers announced the birth of her second child on Instagram on the 12th November.
James Corden and Julia Carey
James Corden and his wife Julia Carey welcomed their third child into the world, a baby girl.
Nathan Massey and Cara de la Hoyde
Love Island 2016 winners Nathan Massey and Cara de la Hoyde welcomed a baby boy in December.
Rachel Adedeji and Jason Finegan
Hollyoaks star Rachel Adedeji and husband Jason Finegan announced the birth of their first child, born on the 21st December.
Alexis Ohanian and Serena Williams
Geri & Christian Horner welcomed a baby boy called Monty
Geri & Christian Horner welcomed a baby boy called Monty
Stephanie Davis & Jeremy McConnell welcomed a baby boy called Caben-Albi
Janet Jackson & Wissam Al Mana welcomed a baby boy called Eissa Al Mana
Janet Jackson & Wissam Al Mana welcomed a baby boy called Eissa Al Mana
Jamie & Rebekah Vardy welcomed a baby boy called Finley Jaiden
Jamie & Rebekah Vardy welcomed a baby boy called Finley Jaiden
Billie Faiers & Greg Shephard welcomed a baby boy
Billie Faiers & Greg Shephard welcomed a baby boy
Alex Jones & Charlie Thomson welcomed a baby boy called Edward
Alex Jones & Charlie Thomson welcomed a baby boy called Edward
Pharrell Williams & Helen Lasichanh welcomed triplets
Pharrell Williams & Helen Lasichanh welcomed triplets
Mel Gibson & Rosalind Ross welcomed a baby boy called Lars Gerard
Katherine Heigl & Josh Kelley welcomed a baby boy called Joshua Jr.
Katherine Heigl & Josh Kelley welcomed a baby boy called Joshua Jr.
Natalie Portman & Ben Millepied welcomed a baby girl called Amalia
Natalie Portman & Ben Millepied welcomed a baby girl called Amalia
Sean Paul & Jodi Stewart Henriques welcomed a baby boy called Levi Blaze
Sean Paul & Jodi Stewart Henriques welcomed a baby boy called Levi Blaze
Rochelle & Marvin Humes welcomed a baby girl called Valentina Raine
Rochelle & Marvin Humes welcomed a baby girl called Valentina Raine
Jessica Ennis-Hill and her husband Andy are expecting a baby
Jessica Ennis-Hill and her husband Andy are expecting a baby
Cheryl and Liam Payne welcomed a baby Bear in March!
Cheryl and Liam Payne welcomed a baby Bear in March!
Five After Midnight's Kieran Alleyne welcomed a baby boy with his ex Sophie
Five After Midnight's Kieran Alleyne welcomed a baby boy with his ex Sophie
Bradley Cooper and Irina Shayk welcomed their first child together
Bradley Cooper and Irina Shayk welcomed their first child together
Benedict Cumberbatch and Sophie Hunter welcomed their second child, a baby boy
Benedict Cumberbatch and Sophie Hunter welcomed their second child, a baby boy
Helen Skelton & Richie Myler welcomed their second child
Helen Skelton & Richie Myler welcomed their second child
Lucy Pargeter and Rudi Coleano welcomed twin girls called Missy Mabel and Betsey Maggie in April
Lucy Pargeter and Rudi Coleano welcomed twin girls called Missy Mabel and Betsey Maggie in April
Ronan Keating and his wife Storm welcomed baby Cooper in May
Ronan Keating and his wife Storm welcomed baby Cooper in May
Former TOWIE star Amy Childs welcomed a baby girl
Ronan Keating and his wife Storm welcomed baby Cooper in May
Alex & Steven Gerrard welcomed their 4th child, a baby boy called Lio
Alex & Steven Gerrard welcomed their 4th child, a baby boy called Lio
UFC star Conor McGregor & girlfriend Dee welcomed a baby boy in May
UFC star Conor McGregor & girlfriend Dee welcomed a baby boy in May
Ciara and Russell Wilson welcomed a baby girl in April
Ciara and Russell Wilson welcomed a baby girl in April
Kieron Richardson and his husband Carl Hyland welcomed twins, Chase and Phoebe in May
Kieron Richardson and his husband Carl Hyland welcomed twins, Chase and Phoebe in May
George and Amal Clooney welcomed twins called Alexander and Ella
George and Amal Clooney welcomed twins called Alexander and Ella
MIC stars Binky & JP welcomed a baby girl in June
MIC stars Binky & JP welcomed a baby girl in June
Beyoncé and Jay-Z welcomed twins Rumy and Sir Carter in June
Jason Statham and Rosie Huntington-Whiteley welcomed their first child together in June, a baby boy called Jack Oscar.
Jason Statham and Rosie Huntington-Whiteley welcomed their first child together in June, a baby boy called Jack Oscar.
Lauren Conrad welcomed her first child with her husband William Tell in July. She welcomed a baby boy called Liam James Tell.
Lauren Conrad welcomed her first child with her husband William Tell in July. She welcomed a baby boy called Liam James Tell.
Harry and Izzy Judd welcomed a baby boy called Kit.
Harry and Izzy Judd welcomed a baby boy called Kit.
Chanelle Hayes welcomed a baby boy
Hollyoaks star Chelsee Healey welcomed a baby girl called Coco.
Rag 'n' Bone Man and girlfriend Beth
Danielle Lloyd welcomed a baby boy called Ronnie
Dame Jessica Ennis-HIll welcomed a baby girl called Olivia
Kian Egan and Jodi Albert
Former Westlife singer Kian Egan and his wife Jodi Albert welcomed their third son into the world and called him Cobi.
Heidi and Spencer Pratt
Reality TV couple Heidi and Spencer Pratt welcomed their first child, a baby boy called Gunner Stone.
Ferne McCann
Ferne McCann welcomed her first child into the world in November. The former TOWIE star called her daughter Sunday.
Jake Hall and Misse Beqiri
Jake Hall and Misse Beqiri welcomed a baby girl called River into the world in November.
Sir Andy Murray and Kim Sears
Scottish Tennis champion Sir Andy Murray and his wife Kim Sears welcomed a baby girl into the world in November. The new arrival is their second daughter.
Cristiano Ronaldo and Georgina Rodriguez
Footballer Cristiano Ronaldo has announced the birth of his fourth child, the first with his girlfriend Georgina Rodriguez on Instagram.
Sam Faiers and Paul Knightley
Former The Only Way Is Essex star Sam Faiers announced the birth of her second child on Instagram on the 12th November.
James Corden and Julia Carey
James Corden and his wife Julia Carey welcomed their third child into the world, a baby girl.
Nathan Massey and Cara de la Hoyde
Love Island 2016 winners Nathan Massey and Cara de la Hoyde welcomed a baby boy in December.
Rachel Adedeji and Jason Finegan
Hollyoaks star Rachel Adedeji and husband Jason Finegan announced the birth of their first child, born on the 21st December.
