There's a good reason he's been walking around town looking like an overgrown tween rocking a ridiculous side-swept 'do...
Turns out Affleck subjected himself to the scissors for his new movie, Argo, which he is both directing and starring in, his rep tells E! News.
The political thriller, based on the true story of how the CIA used a fake sci-fi film to rescue Americans during the Iran hostage crisis in 1981, will be produced by Affleck's pal George Clooney.
So that explains why the Gone Baby Gone director's hairstyle is so outdated.
Alan Arkin and John Goodman have joined the cast, with Affleck playing the leading man, natch.