Plus, see the Tony winner joined by Marc Shaiman for a special musical performance on The Late Show With Stephen Colbert.
The play will take place a decade before Game of Thrones; Duncan MacMillan has written a script based on George R.R. Martin's novels.
The Broadway actor will be part of the 20th anniversary company of the hit musical at the Apollo Victoria.
The Pops' 43rd Birthday Gala will be led by music director and conductor Steven Reineke.
The musical, based on the F. Scott Fitzgerald novel, continues at the Broadway Theatre and on a national tour.
The musical about screen addiction will be produced by 5000 Broadway Productions.
With only three hours notice, the couple will take to the stage of Shawn's play.
Bay Street Theater and Sag Harbor Center for the Arts will honor the Hamilton creator during its summer gala.
Shaina Taub's suffragist musical will be broadcast in May.