Sandra Bullock hat sunglasses jeans baby pirate party
Sandra Bullock hat sunglasses jeans baby pirate party

Ahoy mateys!

Sandra Bullock carried her greatest treasure, adorable son Louis, to a pirate themed Halloween in a Brentwood park, on Sunday.

The mommy-son duo came dressed in matching buccaneer costumes, and had an absolute blast jumping in the bounce house together.

The Blind Side actress proudly snapped pix of her one-year-old son in his darling little outfit -- complete with sword holster and pirate boots. So cute!

Bullock is gearing up to start promoting her upcoming flick, Extremely Loud and Incredibly Close, which is set to hit theaters Jan. 2012.