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.

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Grey's Anatomy Quotes

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."

There's a reason I said I'd be happy alone. It wasn't 'cause I thought I'd be happy alone. It was because I thought if I loved someone and then it fell apart, I might not make it. It's easier to be alone, because what if you learn that you need love and you don't have it? What if you like it and lean on it? What if you shape your life around it and then it falls apart? Can you even survive that kind of pain? Losing love is like organ damage. It's like dying. The only difference is death ends. This? It could go on forever.

Meredith