'Breaking Dawn' Actress Elizabeth Reaser Dotes On (Onscreen) Granddaughter Mackenzie Foy

Let's be real: When it comes to enjoying the "Twilight" movies, suspension of disbelief is a key factor. There's the whole "vampires are sparkly" thing; the whole "accelerated hybrid pregnancy" thing; the whole "pretend like you didn't notice Kristen Stewart's horrible wig" thing...

And then there's the fact that, in "Breaking Dawn," the ridiculously fresh-faced Elizabeth Reaser is supposed to be somebody's grandmother. Crazy! So when we caught up with the actress who plays Esme Cullen at the Sundance Film Festival, we had to ask what she thinks about Mackenzie Foy, the 10-year-old actress who plays Bella-Edward offspring Renesmee Cullen.

"She's actually my vampire grandchild," Elizabeth said with a laugh. "I'm a grandma. This is... far too quick."

But like any good grandma, she's also happy to gush about the grandkid: "She's a wonderful, great actress, she never complains about anything, and she's so professional and just a sweetheart."

And if you've ever thought to yourself that Mackenzie looks an awful lot like her on-screen parents Robert Pattinson and Kristen Stewart, you're not alone. Even Elizabeth thinks the role of Renesmee was "really well cast," as she exclaimed, "She could be their kid!"

Do you buy Elizabeth as a vampire grandma?