Grey’s Anatomy star T.R. Knight and his boyfriend Mark Cornelson are set to kick off National Gay Pride Month with the Matthew Shepard Foundation. The couple will celebrate a massive symbolic commitment ceremony in Hollywood Wednesday, but the couple told UsMagazine that they are not planning to marry during the ceremony.

“Mark just moved here from San Francisco,” Knight told Usmagazine.com Saturday. “To clarify, we are not having a commitment ceremony and I am not performing a commitment ceremony.” Knight said the recent legalization of gay marriage in California gave him an “extraordinary feeling.”

“Once you are given something that you were never allowed before, you realize how much of a second class person you were before,” he told Us. “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 added.

Knight said his “Grey’s Anatomy” cast mates really like his boyfriend Mark. “Someone in particular, I won’t mention names told me, ‘You know I like him more than I like you, right?’” the actor, 35, joked. “They said it about three or four times so it’s kind of not as funny as it was the first time anymore.”

“They love him,” Knight said. “They’re like, ‘When is he coming?’ They want him there.”

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