Sean Preston & Jayden James Federline: Planet 51 Pals

Major cuties Sean Preston and Jayden James Federline go out with their dad, Kevin Federline, and their nanny to see Planet 51 on Sunday (December 20) at the Pacific Theaters in Chatsworth, Calif.

31-year-old Kevin watched the boys while mama Britney Spears traveled to NYC!

Despite his baggy clothes, you can tell Kevin is looking much slimmer than before – he took part in the most recent season of Celebrity Fit Club, which will air early next year, according to Us Weekly.

15+ pictures inside of Britney and Kevin‘s boys going to see Planet 51…