James Franco Goes Shirtless on Set, Works His Six-Pack Abs With Long, Flowing Wig

James Franco shows off his abs while filming a scene for his upcoming flick. Credit: Cousart/JFXimages/Wenn

Abs-olutely hot! James Franco worked his six-pack abs on the set of his new movie, The Disaster Artist, on Thursday, Dec. 10, in L.A.

PHOTOS: Hot shirtless celebs

The 127 Hours star, 37, was shirtless in behind-the-scenes pics that put his toned torso front and center. But another focus of the snapshots was his flowing wig.

PHOTOS: Celebs killer bikini bods

The former Oscar host donned faux dark brown locks, featuring soft, beachy waves, for the role of Tommy Wiseau — a director, actor, and producer from the 2000s who now has a cult following because of The Room, a 2003 film that some critics called the worst movie ever made.

Seth Rogen and Franco's little brother Dave Franco also star in the film. James' baby bro's persona also involves major hair and makeup, as he plays the role of Greg Sestero — a blonde, bearded actor — in the flick.

James shared a pic of himself and his brother in full costume via Instagram on Dec. 7. "'THE DISASTER ARTIST: The making of THE ROOM.' It has begun!!!!!" he wrote along with the smiley selfie.

💥"THE DISASTER ARTIST: The making of THE ROOM."💥 It has begun!!!!!

A photo posted by James Franco (@jamesfrancotv) on

Zac Efron, Kate Upton, Dave's fiancée, Alison Brie, and Jackie Weaver will also appear in the comedy.

What do you think of James' washboard abs on set? Tweet with @UsWeekly using the hashtag #stylebyUs!

Get celeb fashion, beauty tips, and more delivered directly to your inbox. Sign up for the Us Weekly Style & Beauty newsletter now!