YouTube’s official Upfronts presentation this morning featured several new exclusive webseries fronted by A-list celebrities, including Ellen DeGeneres, Demi Lovato and Kevin Hart.

Hart will star in What The Fit?, a comedic fitness show appearing exclusively each week on Hart’s Laugh Out Loud Network channel on YouTube. He’ll join famous friends and YouTube Stars for various workout routines, both inside and outside of the gyms.

“This is a show for everyone – young, old, athletes and couch potatoes alike – and I’m proud that it will launch exclusively on our new LOL network on YouTube,” said Kevin Hart.“Lionsgate and YouTube are great partners, and this collaboration allows me to add a whole new audience to my fan base and shape up viewers around the world.”

“Kevin Hart is one of the funniest people on earth,” said Susanne Daniels, Global Head of Original Content, YouTube. “We can’t wait to see Kevin motivate and inspire hisfans to embrace fitness while laughing at the same time.”

“We’re delighted to team with two game-changing innovators, Lionsgate and YouTube, on a show that will revolutionize the way people think of fitness,” said Jeff Clanagan, President of Hart’s company, Hartbeat Digital, and President of the LOL partnership with Lionsgate. “The combination of a brilliant concept, Kevin’s massive global fan base and an unparalleled creative team will put Kevin’s latest entrepreneurial endeavor in a class by itself.”

“It is rare to work with a megastar talent like Kevin Hart, who has such an incredible relationship with his fans, and I’m fortunate to have such visionary and supportive partners as YouTube and Lionsgate,” said producer Matt Kunitz (Fear Factor, Wipeout). “Kevin Hart: What the Fit? is the kind of signature property that will resonate with audiences around the world.”

Hart introduced Laugh Out Loud Network last year, and filmed a series of stand-up showcases last summer for it at Montreal’s Just For Laughs. That series and others haven’t yet debuted online, but the channel so far has 747,000 subscribers.

Here’s the channel teaser:

And here are descriptions for some of the other comedic exclusives coming to YouTube:

  • Ellen’s Show Me More Show: Like nothing Ellen has done before, Ellen’s Show Me More Show is a twice-a-week series built just for YouTube, giving fans behind the scenes access to some of the biggest stars and her favorite moments.
  • Good Mythical Morning: Worldwide YouTube superstars—and hosts of YouTube’s most popular daily show—Rhett & Link will go to new heights in a long-form expansion of Good Mythical Morning, giving fans even more of what they crave: larger-than-life stunts, zanier challenges, and over-the-top laughs.