Will Arnett Flexes 6-Pack in "Up All Night" Promo

Posted Thursday September 20, 2012 4:10 PM GMT

Despite his recent divorce from Amy Poehler, Will Arnett appears to be in great spirits.

The 42-year-old actor shows off his killer abs in a new promo shot for “Up All Night,” which he stars in alongside the lovely Christina Applegate.

A source told Us Weekly that "Will looks really good right now. Everybody is talking about cut he is," adding, "He's been working out and his skin is really great."

And although Arnett and his ex-wife split, they reportedly still have a lot of respect for each other. The comedian and his sons, Archie, 3, and Abel, 2, were spotted attending Poehler's 41st birthday party over the weekend.

Photo Credit: Gavin Bond for NBC