Sandra Bullock urges fans to help in clean-up effort of Gulf oil spill

Sandra Bullock, Blake Lively, Lenny Kravitz and Dave Matthews are playing the role of good Samaritans, urging fans to pitch in to clean up the Gulf oil spill mess.

According to the Daily Express, the stars have filmed a PSA for Restore the Gulf, an initiative to secure long-term funding to clean up and protect the Gulf Coast and surrounding wetlands, which have suffered serious damage since the BP disaster struck.

The public service announcement debuted on USMagazine.com and prompts users to sign an online petition that will be delivered to the US Congress.

In the clip, Bullock asks, "What can you offer? Your voice. Speak up!"