Kaley Cuoco, Ryan Sweeting, Kate Beckinsale [1], and other celebrities flocked to Joel Silver's annual star-filled Memorial Day party in Malibu, CA, on Monday. Newlyweds Kaley and Ryan couldn't keep their hands off each other and had a serious snuggle session on the sand. Meanwhile, Kate, Gwen Stefani [2], and January Jones [3] kept a close eye on their little ones, with January even playing around with a group of kids with a squirt gun. We'd never see Betty Draper do that! Keep scrolling to see more stars at Joel's bash, and check out how other stars celebrated Memorial Day [4] (hint: BBQ, shirtlessness, and babies were involved).

Diane Kruger [5] and Joshua Jackson [6] arrived together.

Kaley Cuoco and Ryan Sweeting showed PDA on the beach.

Gwen Stefani [7] chatted with a valet.

Meanwhile, Gavin Rossdale [8] was on dad duty.

Kate Beckinsale [9] looked white hot in a jumper.

Rande Gerber and Cindy Crawford [10] arrived with margaritas and bottles of Rande's Casamigos tequila in hand.

January Jones [11] played with a squirt gun.

Rita Wilson wore a black ensemble.

Tobey Maguire [12] kept it casual. Keep scrolling for more pictures!