T.R. Knight Dating Mark Cornelsen

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Looks like T.R. Knight is off the market.

The Emmy-nominated Grey's Anatomy star, who plays George O'Malley, stepped out with boyfriend Mark Cornelsen during the 2008 Elton John AIDS Foundation Oscar Party held at the Pacific Design Center in West Hollywood on Sunday.

The two held hands and looked very happy together. See below:

T.R. Knight, Mark Cornelsen

Mark Cornelsen and Grey's Anatomy star T.R. Knight.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.

Noname

Gay, straight, black, white, purple T.R. is a doll! Next to Sara Ramirez, I have the biggest crush on him! I tried to hard to hate him after he hurt my Callie, but you just can't no matter how hard you try. And in real life he's even more adorable with his handsome beau! Good luck to them, I hope they last!

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Awww, way too cute

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i never knew T R was gay.but still der very cyte together

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thats so cute XD he's a awesome guy..i'm happy for him. another great guy's off the market.

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Mark I am so happy for you!

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cuties!

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I am glad he found love, he is a great guy.

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LOL, even though my first reaction was back off Mark, TR is mine, my second was aww, they are so cute and TR looks so happy.

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Mark's a cutie. They look very happy together!

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aww....he's so cute and TR looks so happy!

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Grey's Anatomy Quotes

CRISTINA: "There's a club. The Dead Dads Club. And you can't be in it until you're in it. You can try to understand, you can sympathize. But until you feel that loss... My dad died when I was nine. George, I'm really sorry you had to join the club."
GEORGE: "I... I don't know how to exist in a world where my dad doesn't."
CRISTINA: "Yeah, that never really changes."

MEREDITH: "You don't get to call me a whore. When I met you, I thought I had found the person that I was going to spend the rest of my life with. I was done! All the boys and all the bars and all the obvious daddy issues, who cares? I was done. You left me. You chose Addison. I'm all glued back together now. I make no apologies for how I chose to repair what you broke. You don't get to call me a whore."
DEREK: "This thing with us is finished. It's over."
MEREDITH: "Finally."
DEREK: "Yeah, it's done."
MEREDITH: "It is done."