Garner, 42, who has been married to Affleck for nine years, said the actor has worked really hard to build his body for the role in the superhero film, reported E! Online.
"He was in crazy shape for 'The Town'," she said, referring to the 2010 film Affleck, 42, co-wrote and directed.
"I've seen him kind of in every different variation, so I'll take him however I can get him! But as long as this is the guy I'm married to, I'm kind of like, 'Wow! That's crazy!' He looks insane.