Is he really excited for Tintin, maybe?
Hard to say, but dressing up as one's fave sci-fi character is a pretty common practice at Comic-Con.
And it's really our favorite possible explanation for Rob Lowe's lightened locks...
MORE: Check Out Our Comic-Con Photo Gallery Bonanza!
But yeah, we know that despite the surfer look he's sporting, Rob actually dyed his hair gray for a movie role.
Still, this is lookin' blond to us.
And since blondes have more fun we started to wonder which fanboy favorite Rob looks most like with his highlighted shaggy 'do?
Star Wars ("A New Hope")'s Luke Skywalker (Mark Hamill)? Game of Thrones' Jaime Lannister (Nikolaj Coster-Waldau)? True Blood's Eric Northman (Alexander Skarsgrd)? Drive's Irene (Carey Mulligan)? You tell us!