But theSmallvillealum revealed Tuesday morning on Twitter that he wont be playing Lex Luthor in the five-part TV event.

However, it wasnt for lack of trying on The CW and Warner Bros. TV side of things!

Friends, many of you have tweeted and asked me about joining the Infinite Crossover, Rosenbaum writes.

SMALLVILLE

Credit: LORENZO AGIUS/The CW

I cant tell you how much this means to me.

Ill just be straight up about this.

WB called my agents Friday afternoon when I was in Florida visiting my grandfather in a nursing home.

Their offer: No Script.

No idea what Im doing.

No idea when Im shooting.

And the real kick in the ass We have to know now.

My simple answer was Pass.

I think it’s possible for you to understand why.

Representatives for WB Television had no comment.

After leavingSmallville(and returning for the series finale), Rosenbaum starred onBreaking InandImpastor.

The crossover then resumes with part two after the holiday break withArrowandLegends of Tomorrowon Tuesday, Jan. 14.