But if you do need more proof, there's this.
Beckinsale had to be in good shape to make the Underworld films: It's hard to sell kicking werewolf ass if you're not.
We don't know of any new Underworld movies in the future; we do know Kate Beckinsale is having a better time dressing her cat as a dinosaur than she'd probably ever have on a movie set.
And her Insta, as usual, is crazy fun in general. Check out some more shots below.