Producer Joel Silver gathered his famous friends in Malibu yesterday for a Memorial Day bash. Tom Cruise attended along with Katie Holmes, son Connor, and a high-heel-wearing Suri Cruise while Gwen Stefani and Gavin Rossdale turned out with their sons Kingston and Zuma. Guy Ritchie rolled up with his pregnant girlfriend Jacqui Ainsley, who could talk parenthood with a likewise expecting January Jones. The Mad Men star was just in NYC, where she showed off her upcoming blockbuster X-Men: First Class. A fresh-from-Paris Diane Kruger soaked up the sun with boyfriend Joshua Jackson while the holiday provided a chance for Courteney Cox and David Arquette to reunite with their daughter Coco. Celebrity babies were lucky to run on the sand between bouncy castles, and Minnie Driver's son Henry took advantage alongside Jennifer Meyer and Tobey Maguire's Ruby and Otis.