Although of course there may be more, but we now know that the final member of the cast of The CW‘s Arrow as set forth in the plans in now in place. Please welcome Colin Donnell to the stage, as we cheer the fact that one of our most hotly anticipated pilots is continuing to take shape.

According to Deadline, he’ll be playing Tommy Merlyn. Here’s the casting breakdown from our post last month:

TOMMY MERLYN
What They’re Looking For: 28 years old and devil-smooth, Tommy is a trustafarian like Oliver, a spectacularly rich young man whose life revolves around parties, clubs, liquor and lots of anonymous sex. Unlike Oliver, he can’t seem to understand his former best friend’s sudden change of lifestyle and direction.

Hmm, Merlyn… Merlyn… gee isn’t there a DC Comics villain in the Green Arrow stories that goes by that name, with that spelling? But he was never Oliver’s best friend, was he? Hmm…

We will OBVIOUSLY keep you posted.