T.R. Knight and Mark Cornelsen have been dating for months. They seem to be very happy together, which we are always happy to see.

Nothing wrong with a photo of TR Knight and Mark Cornelsen. They look like a happy couple - although they won't wed anytime soon, TR says.

Grey's Anatomy stars Katherine Heigl and T.R. Knight shopping last week. Very cute photo!

T.R. Knight and Mark Cornelsen walk through New York in this photo from December 2008.

Knight, that is. Is he gone from Grey's Anatomy or not? We'll have to wait and see.

A nice picture of T.R. Knight and Mark Cornelsen at Disneyland. How cute and fun.

T.R. Knight has scored another Broadway role in the wake of his departure from Grey's Anatomy. We wish him nothing but the best!

Ellen Pompeo and now-former co-star T.R. Knight go shopping in L.A. in June 2009. We are glad they are still such good friends.

T.R. Knight has officially bid farewell to Grey's Anatomy after a tumultuous final season and a gripping finale. We wish him all the best and thank him for all his good work!

T.R. Knight is gone from Grey's Anatomy, but we will continue to hear big things from this actor in the future, without question.

T.R. Knight on the cover of Entertainment Weekly. The Grey's Anatomy star opens up on his reasons for leaving the hit show.