Kate Beckinsale on Her New Beauty Gig and Self-Care Secret: 'Baths, Everyday ⁠— No Matter What!'

Kate Beckinsale could teach a master class on red carpet glam. But in her down time, the actress has a low-key approach to her skin care and beauty routines.

"I didn't really have a skincare routine until I was much older, probably in my late thirties, early forties," Beckinsale, 48, told PEOPLE at the Los Angeles launch of MRVL's Skin Solutions, for which she is the new spokesperson.

The Guilty Party actress admits that while good genes have a lot to do with the health of her skin, she's also been very proactive about limiting her sun exposure.

"I'm really lucky, my mum's got really good skin," she says. "I think obviously some of it is a genetic thing, although you can mess that up. I didn't see sun for the first several decades of my life and that's probably been a big help. A great deal of it was geography [growing up in England], but the other thing was on the very rare occasions when we would go on a family vacation somewhere hot, I was paranoid that I would get freckles in a mustache formation on my face. So I was wearing Factor 70 [SPF]. I just didn't want a mustache, that's really why I used sunscreen."