A pictorial tribute to birthday boy T.R. Knight

Today is the thirty-sixth birthday of out Grey's Anatomy star T.R. Knight, and to celebrate we thought we'd take a look back at T.R. through the years.

With boyfriend Mark Cornelson (Pics: Getty)

And one more

Waxing eloquent at the HRC awards

Hmm .. I think grandma's blue rinse works on him

and even, um ... this look

He even looks good in this!

Freshly shorn

The early years, with friends Katie Finneran and Thomas McCarthy

With BFF Katherine Heigl

Finally, from a few years ago, here's T.R. with a friend. Possibly another actor.