The "Smurfs" star and his husband took their 2-year-old twins, Harper and Gideon, to the blue carpet event, and even though the little ones looked a tiny bit grumpy in some of the pictures, there's no denying the happy family brought the cute.
Harris's co-star singer/actress Katy Perry was also on hand for the event, decked out in all blue -- of course. Britney Spears, who belts out a track on the movie's soundtrack, also enjoyed some family time, with her two boys, Jayden and Sean, in tow.
In the Smurf-tastic sequel, Papa Smurf, Smurfette, and the rest of the gang need to once again battle evil wizard Gargamel (Hank Azaria) and his Naughties, Smurf-like creatures he's created in hopes of harnessing the Smurf essence.
Check out the cute pictures below. "The Smurfs 2" hits theaters July 31.