Actor Chad Allen has posed for the NOH8 Campaign, the silent protest which raises awareness and funds for gay rights causes, including ending California's 2008 voter-approved gay marriage ban, Proposition 8.

The 37-year-old Allen is best know for his childhood roles as David Witherspoon on the NBC family drama Our House and Zach Nichols on the NBC sitcom My Two Dads. He later played Matthew Cooper on the western drama Dr. Quinn, Medicine Woman, which starred Jane Seymour and ran on CBS for 6 six seasons.

Allen was outed in 1996, at the age of 21, when tabloid The Globe published photos of Allen kissing another man in a hot tub.

He played gay sleuth Donald Strachey in the mystery film series based on the novels written by Richard Stevenson: Third Man Out, Ice Blues, Shock To The System and On The Other Hand, Death. He also played Mark, a gay man looking for salvation, in the 2007 film Save Me.

The NOH8 Campaign is helmed by photographer-activist Adam Bouska and his partner Jeff Parshley. The pair photograph celebrities and everyday folks with their mouths duct taped and the campaign's familiar “NOH8” slogan often written on one cheek.

In his photograph, Allen wears a sleeveless white t-shirt as he begins to peel off the duck tape from his mouth.