Question: What is the name of this American actor in theatre, television, and film from "Peter and the Starcatcher" who played a song writier in the  musical TV series "Smash?"
Sentence (from "Don't Say Yes Until I Finish Talking"): "Don't Say Yes Until I Finish Talking" is an original song introduced in the tenth episode of the musical TV series "Smash", entitled "Understudy".
Relevant evidence: Yes