Skinny Jonah Hill barely recognizable at ESPY Awards

Jul 14, 2011 at 5:43 p.m. ET

From Superbad to super-skinny! Actor Jonah Hill has lost so much weight that he was almost unrecognizable at the 2011 ESPY Awards last night. What made him decide to get healthy and lose the weight?

Actor Jonah Hill is famous for playing the pudgy, funny guy in movies like Superbad and Get Him to the Greek-- but the actor has been on a mission to lose weight for his new role in 21 Jump Street and showed off his super slim physique at the ESPY Awards last night.

Jonah Hill weight loss before and after

Wearing a black suit, striped purple shirt and tie, he has lost so much weight that he looks like a different person!

He said he is not sure exactly how much weight he has lost, but recently told reporters he started working out with a personal trainer and hired a nutritionist because he "thought it was important to be healthier."

Jonah Hill at 2011 ESPY Awards

"It's not fun," he admitted, about his mission to lose weight. "I wouldn't say it's the most fun endeavor I've ever took on in my life -- but it's important. And I'm enjoying it. If I eat something unhealthy now, I kind of feel a little weird and my body hurts."

He also wanted to get fit for his new role in 21 Jump Street, co-starring Channing Tatum.

"It's a comedy with really cool action. We're not doing something serious like Miami Vice," he says. "It's a funny movie with a lot of great action and a real story."

Hill, right, posed with Minnesota Timberwolves star Kevin Love. They presented the award for Best Game at the ESPY Awards.

Tell us: What do you think of Jonah Hill's slimmed down look?