Yesterday's LA premiere for Monsters University was full of more famous tots than a Hollywood playground. Gwen Stefani and Gavin Rossdale walked the blue carpet with their sons, Kingston and Zuma, while Alessandra Ambrosio modeled alongside her adorable daughter, Anja. Melissa Joan Hart also dropped by the bash with her son, Tucker, whom she carried into the premiere. The kid-friendly bash also drew stars from the film like Billy Crystal, Sean Hayes, and Charlie Day, who told us earlier this week that he is happy to be doing a project that "won't embarrass his parents." Check out our interview with Charlie Day, and be sure to watch our review of Monsters University to see if it's worth checking out this weekend.