Musical Celebration of Broadway
Tony-winning director Michael Mayer made the announcement at last night's event.
Newly announced cast members also include Malcolm Gets, Anthony Rapp, and Krysta Rodriguez.
Donna Murphy, Kal Penn, Tim Gunn, and more will take part in the event.
The Drama League is celebrating the How I Met Your Mother star's return to Broadway this spring in Hedwig and the Angry Inch.