ET is bringing you behind the scenes of Isaiah Washington's new PSA in support of gay marriage rights.

Washington made the public service announcement for the NO H8 campaign, which was launched by photographer Adam Bouska and partner Jeff Parshley in opposition to the passage of Proposition 8, which banned gay marriage in California.

A number of celebs have also posed for NO H8 campaign photos, including Ashlee Simpson-Wentz and hubby Pete Wentz, director Bryan Singer, Fran Drescher and John McCain's daughter Meghan, as well as hundreds of private citizens. The photos feature subjects with duct tape over their mouths, symbolizing their voices not being heard, and NO H8 painted on one cheek in protest.

Watch our video, which also includes clips from a PSA featuring Shanna Moakler and Perez Hilton.