Come From Away has extended its run in the West End until 2020.
The musical had previously been running at the Phoenix Theatre until September 14, but it is now booking until February 15, 2020.
The show tells the story of the 7,000 people stranded in Newfoundland, Canada following 9/11. It won four Olivier awards last month, including best new musical.
Come From Away continues to run on Broadway and Canada, with an Australian production confirmed for next year, and a film adaptation in development.
The stage musical is written by Irene Sankoff and David Hein, and directed by Christopher Ashley, with choreography by Kelly Devine.
The West End cast includes Rachel Tucker, Clive Carter and Robert Hands.
It is produced by Junkyard Dog Productions and Smith and Brant Theatricals.