Who knew they were friends?!

Britney Spears lives a pretty private life, so we had no idea she was pals with Kate Hudson until we saw these photos of the two stars hanging out over the weekend! The pop princess dropped by the actress' pad, and naturally the occasion had to be documented on Instagram.

"That moment when @britneyspears shows up to your game night and your all like #itsbritneybitch," the Almost Famous star captioned one of the snapshots.

We wonder if Brit Brit got the scoop on Kate's rumored romance with Nick Jonas? The 36-year-old got people talking after she was photographed with the former boybander in Miami, and sources claim that the two are definitely hooking up.

We want to be part of this #squad!