Look like she's showing ol' Ben what he's missing!

Jennifer Garner wore some shiny black liquid leggings to her workout class in Brentwood over the weekend, and we are so used to seeing her in mom jeans that we had no idea she had this hot bod! The stress of her divorce with Ben Affleck could be causing her to shed a few pounds, but the more likely explanation is that she's getting fit to get back in the dating game.

The mother-of-three and her Batman star ex have been spending a lot of time together in recent weeks, which has naturally sparked reconciliation rumors, but we think they are just playing nice for the kids. Speaking of which, whatever happened to the reports that the Boston hunk was getting cozy with his co-star Sienna Miller. Something tells us there's some truth to those...