The actor sported long hair and bushy facial fuzz for his role in 1970s-set film Argo, about an American secret agent who helped free U.S. hostages in Iran by disguising them as a Canadian film crew.
Affleck is convinced he looked like Bee Gees star Gibb after his makeover and reveals his kids hated his new look.
He tells the Boston Herald, "You show real courage as an actor when you don't mind doing Barry Gibb... My kids hated it. They wanted me to shave the beard, cut the hair. I told them 50 times, 'This is for work,' but I don't think they believed me. They're like, 'What work wants your hair on your face?'"