The duo star as Jean-Michel Basquiat and Andy Warhol in Anthony McCarten's play, which premiered at London's Young Vic earlier this year.
The Billy Elliot and Gentleman's Guide star is playing David, filling in for Christopher Fitzgerald, through July 24.
Based on the 2000 film of the same name, the musical features a score by Tony and Pulitzer winner Tom Kitt and a book and lyrics by Cameron Crowe, the film's writer.
What's announced and what's in previews in the West End.
The Hamilton creator appeared on the July 6 broadcast of The Kelly Clarkson Show to talk about life pre-In the Heights and why now is the best time to see a Broadway show.
The Benny Andersson, Björn Ulvaeus, and Tim Rice musical has added an additional performance at the Theatre Royal Drury Lane.
The hit musical continues at the Trafalgar Theatre.
The bio-musical is set to come to Broadway this fall.
The show, which reimagines the criminal justice system, streams live August 5-7 via East West Players.