Hill explained, "It was important to me, not just because of my health, but also, as an actor, you want to be able to cover a range of roles. Being a chubby guy, I realised I was probably going to keep getting chubby guy roles… They're usually comedic roles too. So, the weight loss will hopefully change that."
He added, "I want to make more movies like Moneyball, right alongside movies like 21 Jump Street. I want to prove to the world that you don't have to be fat to be funny. It helps, of course, but it's not crucial."
Jonah Hill can currently be seen on the big screen, starring alongside Channing Tatum, in the movie 21 Jump Street, which is set to be released in both the US and the UK tomorrow (Friday, March 16).
Do you think Jonah Hill looks better skinny or fat?