Alexander Skarsgard Melts Our Hearts With Fun Size Co-Star Onata Aprile! (PHOTO)

We’re used to True Blood’s Alexander Skarsgard setting our hearts a-flutter, but he took it to the next level at Toronto International Film Festival on Sept. 8, 2012.

In the midst of press for his new film, What Maisie Knew, A. Skars spent some down time with pint-sized co-star Onata Aprile, the lucky little lady who plays his stepdaughter in the movie.

While we already saw him tossing her around and being adorably playful back when they filmed in New York City last year, it was still nice to see them having fun more recently. In the photo above, it looks like they’re having a stare-down in their booth at The Hollywood Reporter’s TIFF Video Lounge — or maybe he’s just threatening to tickle her!

Either way, it’s clear that Alex is a natural with children, and we bet he’ll make a fantastic off-screen dad one day, too! But that’s only if he settles down, and we doubt our favorite sexy Swedish vamp will do that anytime soon!

Will you see What Maisie Knew? Check out the heartwarming trailer below and then tell us in the comments!