Actor Jonah Hill shows off incredible weight loss

Hollywood actor Jonah Hill impressed fans with his weight loss back in January at the Screen Actors Guild Awards and now he's stepped out in LA showing an even bigger change to his appearance.

The 33-year-old looked a shadow of his former self as he showed off his incredible weight loss outside of a gym in America, where he'd been attending a personal training session.

The photo below shows Jonah's transformation from 2014 to now.

The 21 Jump Street star has been working on his appearance for the last few years. Reports suggest Jonah first started a new fitness plan back in 2011 when he was on the set of Moneyball with fellow actor Brad Pitt.

In an interview with ABC News, Jonah later added his weight loss was down to dieting mostly.

Jonah also admitted he sees his weight fluctuate when he drinks beer. He said, "It's so annoying because if I don’t drink beer, I get really really thin. Then when I drink beer, I get a little bigger."

Despite working hard in the gym over the last couple of the years, the actor was forced to gain weight again for his 2016 movie War Dogs with Channing Tatum, but decided to resume his fitness and healthy eating plan when filming ended.

Jonah Hill © PA Images

Jonah hit the big time in 2007 in Superbad alongside the likes of Michael Cera and Seth Rogan.

He then went on to star in a number of high profile films including Knocked Up, 21 and 22 Jump Street, Wolf Of Wall Street and most recently War Dogs.