Musician Tommy Joe Ratliff is participating in a new PSA for gay marriage.

Ratliff is the 29-year-old bass guitarist for American Idol season 8 runner-up Adam Lambert.

Last year, Ratliff joined the NOH8 Campaign, which raises awareness and funds for gay rights causes, including ending California's 2008 voter-approved gay marriage ban, Proposition 8. Photographer-activist Adam Bouska and his partner Jeff Parshley photograph celebrities and everyday folks with their mouths duct taped and the campaign's familiar “NOH8” slogan often written on one cheek.

Ratliff has returned for a second photo shoot and will appear in an upcoming PSA for Freedom to Marry's Say, I Do campaign, which urges President Barack Obama to endorse marriage equality.

Also set to appear in the video is 77-year-old Larry King, the former host of CNN's Larry King Live. Last week, the group released a photo of King wearing a red tie and matching suspenders while holding an old-fashioned radio microphone.

In his new photo, Ratliff is wearing a white shirt and dark eyeliner, and several oversized tattoos are visible.

In a video released by the group, Ratliff is seen autographing his original NOH8 Campaign photo, which is being auctioned off on Ebay. (The video is embedded in the right panel of this page.)

Last week, Los Angeles Chivas USA players Justin Braun and Michael Lahoud posed for the NOH8 Campaign ahead of professional soccer's first-ever Equality Night to benefit the Los Angeles Gay & Lesbian Center on Saturday, July 23.