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Who knew Will Ferrell could look so cute shilling snack cakes?!

The Get Hard star was positively scrumptious dressed as Little Debbie on the Tonight Show Wednesday. Host Jimmy Fallon found his sweet charm irresistibly hilarious, breaking down in giggle fits several times through Will's Little Debbie's guest appearance!

"What's, uh...what's with the costume?" Jimmy asked, trying to stifle his laughter.

"You mean this dress?" Will answered with a smile. "Well, I have to wear it. I'm the new face of Little Debbie snack cakes."

Will Ferrell, Jimmy Fallon

Douglas Gorenstein/NBC

The reason for the 47-year-old actor's yummy new gig? "Let's be honest, Jim," he began. "I'm not the Hollywood hunk I once was. This mug ain't making the moolah like it used to. I got a mouth to feed...my mouth!"

Jimmy joked that was a "little selfish" of the comedian, who is married with three young sons, but Will assured him that his family understands his Little Debbie gig is serious business. In fact, he deadpanned, "I only discipline them [my sons] as Little Debbie."

"If I come around the corner dressed like this...oh, they know they did something wrong," he said. "My wife will say, 'Don't make dad change into Little Debbie!'"

He argued that Jimmy will soon follow in his snack food footsteps. "It's gonna happen to you," he said. "The gravy train's gonna run out, and you're gonna have to start doing this!"

"Really?" asked the late-night host. "Have you run into other mascots? Like, who's doing the Keebler Elves?"

"Keebler Elves right now, it's some of the cast from Mad Men," Will said.

They're not the only ones cashing in either. According to Will, "Owen Wilson is a Cheez-It guy right now!"

"I'm telling you," he told the giggling late-night host. "It's good scratch!"

Get Hard opens March 27.

(E! and NBC are both part of the NBCUniversal family.)