Happy 49th Birthday Sandra Bullock!

Happy 49th Birthday Sandra Bullock!

Bad hair day Sandra Bullock pulled her hat low as she arrived at her son Louis Studio City, California school Friday.

Yet its actually a day for the Oscar winner to celebrate. She turns 49 years young today (July 26). She shares the special occasion with Helen Mirren (68), Kevin Spacey (54), Kate Beckinsale (40), Jeremy Piven (48), Chris Harrison (42) and Mick Jagger (70).

Another reason to party: Bullocks summer hit The Heat (co-starring Melissa McCarthy) is a box office smash, having earned more than $130 million in North America since its release June 28.

Bullocks next project is Gravity, a sci-fi flick co-starring George Clooney. Bullock”s character, first-time astronaut Ryan Stone, tumbles into space when Russian satellite debris tears apart her space shuttle.