Jennifer Garner has joked that she feels as though she's having an affair because of husband Ben Affleck's body shape for his new Batman film.

The actress said on Live with Kelly and Michael: "You know, he has put on 30 pounds of muscle and he's eight percent body fat. He looks pretty good."

She continued: "It's a little bit like, 'Whoa, who are you?' It feels like I'm having an affair. But I don't mind, I'm not complaining!"

See Affleck as the caped crusader in Batman V Superman: Dawn of Justice in cinemas from March 25, 2016.