Mark Cornelsen | Entertainment News, Photos, and Videos

Grey’s Anatomy actor T.R. Knight helps kick off National Gay Pride month with his 19-year-old boyfriend Mark Cornelsen on Wednesday night at West Hollywood’s The Abbey.

Dozens of same-sex couples took part in a symbolic “commitment to protect our rights” ceremony as a celebration of the California Supreme Court decision. Several couples committed with a “vow to vote no” and support of the campaign to defeat the November ballot measure that would take away the marriage rights granted by the California state Supreme Court.

West Hollywood mayor Jeffrey Prang presided over the ceremony, saying, “Your joined hands are outward and visible signs of an inward and spiritual bond, signifying to all your commitment to each other and your commitment in vowing to vote and protect your right to love.”

Couples at the event wore the Matthew Shepard Erase Hate pendant designed by Udi for Judy in memory of her son, who was the victim of a brutal anti-gay hate crime in rural Wyoming 10 years ago.

Earlier this week, T.R. expressed no interest in having a wedding of his own in the near future but said, “We’ve only known each other for six months, so I think it’s a little soon to consider marriage. [But] I don’t think you date anyone that you don’t see a future with.”

Grey’s Anatomy actor T.R. Knight and boyfriend Mark Cornelsen hold hands at the 2008 Chrysalis Butterfly Ball in Los Angeles on Saturday.

“Mark just moved here from San Francisco,” Knight gushed to Us Weekly. “To clarify, we are not having a commitment ceremony and I am not performing a commitment ceremony… Once you are given something that you were never allowed before, you realize how much of a second class person you were before. That is horrible and fantastic at the same time. It makes me want to sob and scream with joy all at the same time.”

“The floodgates have been opened they will never be closed,” Cornelsen, 19, added.

“[One of my Grey's costars] in particular, I won’t mention names told me, ‘You know I like him more than I like you, right?’” T.R. joked. “They said it about three or four times so it’s kind of not as funny as it was the first time anymore. [But] they love him. They’re like, ‘When is he coming?’ They want him there.”

“They’re all wonderful and so sweet,” Cornelsen said. “It’s amazing.”

Grey’s Anatomy actor T.R. Knight and young love Mark Cornelsen do a bit of house hunting together in The Hollywood Hills on Sunday.

Cornelsen wore a “WE ALL HAVE AIDS” t-shirt, which is a call to end HIV/AIDS stigma. It is a powerful display of the unity and solidarity we all share with the 40 million men, women, and children living with HIV/AIDS around the world.

Limited edition WE ALL HAVE AIDS T-shirts have been sold at all Barney’s, Theory, Scoop, Louis of Boston and Kenneth Cole New York stores in the U.S., Holt Renfrew in Canada and Selfridges in London.

T.R. just turned 35 this past Wednesday. HAPPY BELATED, MR. KNIGHT!

Mark Cornelsen comes out to support boyfriend T.R. Knight as the pair make a mad dash to their car outside UCLA’s Royce Hall in Westwood, Calif. on Friday.

The couple and T.R.‘s Grey’s Anatomy costar Katherine Heigl (pictured below) made appearances at “Good Medicine,” a musical benefit to benefit crew members who were affected by the strike. Most of the Grey’s Anatomy and Private Practice casts were in attendance.

Check out TMZ for a video of Heigl literally pushing, pulling and jerking T.R. to not sign any more autographs.