Sacha Baron Cohen & Isla Fisher Dress Up for Halloween!

Sacha Baron Cohen and Isla Fisher look great in their costumes while leaving Kate Hudson‘s Halloween party on Friday night (October 28) in Pacific Palisades, Calif.

The 45-year-old actor was a cow while Isla, 40, dressed up as a mermaid.

Also in attendance at the party were Judd Apatow and Leslie Mann, Johnny Knoxville as a soldier, Kelsey Grammer as Sideshow Bob with his pregnant wife Kayte Walsh, James Corden as an astronaut with his wife Julia Carey, and Adam Sandler.

35+ pictures inside of stars in attendance at the party…