Billy Baldwin and Richard Riehle headed to 'Men at Work' on TBS

TBS' new sitcom "Men at Work" is adding two new guest stars to its already impressive lineup: Zap2it can exclusively reveal that Billy Baldwin and Richard Riehle will appear in upcoming episodes of the comedy, which follows four friends who work together at a magazine.

In the episode "Inventing Milo," Baldwin will play Peter, a famous, free-spirited, sexually driven photographer whom Tyler (Michael Cassidy) is set to profile for the magazine. There's a hitch, though -- Gibbs (James Lesure) idolizes the guy, and his obsession might hinder rather than help his buddy.

Meanwhile, Riehle will stop by the episode "Wake and Bake" as Gus, a man who mistakes Milo (Danny Masterson) for his long-lost war hero family member.

Other guest stars set to appear during Season 1 include Stacy Keibler, Kathy Najimy, T.K. Simmons, Ethan Suplee, Josh Hopkins, Kevin Pollack, Christopher Materson, Wilmer Valderrama, Laura Prepon and Alexandra Breckenridge.

No airdates are scheduled for Baldwin's and Riehle's episodes just yet. "Men at Work" airs Thursdays at 10 p.m. on TBS.