If you didn't know it already, Rupert Grint has clearly bid goodbye to Ron Weasley.
Putting his more innocent Harry Potter days behind him, the 25-year-old British actor drops his drawers in a NSFW clip for his upcoming film CBGB, about the legendary New York music club that spawned such punk and New Wave bands as the Ramones, Talking Heads, Television, Blondie and Patti Smith among others.
In the teaser, which premiered on MTV, Grint plays Cheetah Chrome, the guitarist from '70s punk rockers The Dead Boys, who is approached by a woman who asks him if his hair is really red or whether he dyes it that way.
"It's real," replies Cheeetah, sporting a leather collar (so much for those Hogwarts robes).
To prove it, he drops his pants and gives his female inquisitor a nice look at his privates—and moviegoers a clear shot of his butt.
"So, now you know," Rupert's axe man tells her.
"Yeah, we're good," she says.
Sex, drugs and rock 'n roll indeed.
CBGB also costars Grint's Potter pal Alan ("Snape") Rickman as Hilly Kristal, CBGB's owner; Malin Akerman as Blondie chanteusse Debbie Harry; Castle's Stana Katic as Genya Ravan, aka Goldie, the lead singer for The Escorts and Goldie & The Gingerbreads; and Justin Bartha as Cheetah's Dead Boys bandmate, Stiv Bators.
The film has already premiered on DirecTV's video on demand and hits theaters in limited release on Oct. 11.
Check out the trailer below.