McBrayer, who will be making his West End debut, will play Ogie in a cast that also includes McPhee as Jenna, David Hunter (Kinky Boots, Once) as Dr. Pomatter, Marisha Wallace (Dreamgirls, Broadway's Something Rotten!) as Becky, Laura Baldwin (Big Fish, The Little Beasts) as Dawn, and Peter Hannah (The Strange Undoing of Prudencia Hart) as Earl.
McBrayer is also known for his work on The Jack and Triumph Show. He can be seen in Cooties opposite Elijah Wood and Rainn Wilson, Forgetting Sarah Marshall, Talladega Nights: The Ballad Of Ricky Bobby, and The Campaign.
Waitress was the first Broadway musical to have women in the four top creative team spots: original music and lyrics by Grammy nominee Bareilles, a book by screenwriter Jessie Nelson (I Am Sam), direction by Tony winner Diane Paulus (Pippin, Finding Neverland), and choreography by Lorin Latarro.
The musical continues to run at Broadway's Brooks Atkinson Theatre. A national tour launched in October 2017.