Jennifer Garner says Ben Affleck's Batman costume is ''unbelievably cool''.

The 'Dallas Buyers Club' star has revealed she has seen the Batsuit her husband will be sporting in 2016's 'Man of Steel' sequel, in which he will play Batman, and thinks it is a ''total reinvention'' of the famous outfit.

She told Entertainment Tonight: ''I've seen the suit. It's unbelievably cool. It's a total reinvention, it looks great.''

Affleck is set to play the latest incarnation of Batman in Warner Bros.' upcoming Superman movie, with 'Man of Steel' hunk Henry Cavill reprising his role as the Kryptonian superhero, and Gal Gadot joining the ranks as Wonder Woman.

Last week, Warner Bros. announced it was pushing back the eagerly anticipated movie from July 2015 to May 2016.

The Zack Snyder-directed film will co-star 'Man of Steel' actress Amy Adams, Laurence Fishburne and Diane Lane.

Former Batman actor Christian Bale recently revealed he advised Affleck to ensure his Batsuit allows him to urinate without help.

He said: ''The only thing I said to him is to make sure he can take a p*ss without anyone having to help him because it's a little bit humiliating - at least what I went through - when you have to have someone help you out of the costume in order to do that. That was my main piece of advice to him.''