Adrienne Maloof has 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.

The 51-year-old Maloof appeared in the first three seasons of cabler Bravo's The Real Housewives of Beverly Hills.

Maloof is a co-owner of Maloof Companies, which owns a stake in the Palms Casino Resort in Las Vegas, the Sacramento Kings, the Sacramento Monarchs and the annual Maloof Money Cup, a skateboarding competition. In 2011, she started a shoe collection produced by Charles Jourdan named Adrienne Maloof by Charles Jourdan.

The NOH8 Campaign's Adam Bouska and his partner Jeff Parshley photograph celebrities, politicians, professional athletes and everyday folks with their mouths duct taped and the campaign's familiar “NOH8” slogan often written on one cheek.

In her photo, Maloof is wearing a white t-shirt and making a peace sign.

Celebrities who have recently joined the NOH8 Campaign include actors Josh Hutcherson and Avan Jogia, Nate Ruess, Jack Antonoff and Andrew Dost of the band fun, Glee's Alex Newell, singer Ricky Martin, actress Lana Parrilla, actor LeVar Burton, Minnesota Vikings punter Chris Kluwe, singer LeAnn Rimes, actor Taye Diggs, actor James Van Der Beek, actress Aisha Tyler, Glee's Nene Leakes, singer Miley Cyrus, Hot in Cleveland's Valerie Bertinelli, Wendie Malick and Jane Leeves, singer Courtney Love and Meghan and Cindy McCain.