Actor Kevin Spacey castigated a theatre-goer whose mobile phone went off during the opening night of his one-man show.
The Oscar winner is performing legal drama Clarence Darrow as he marks the end of his 10 years as artistic director at London's Old Vic.
During a scene in which Darrow, a civil rights lawyer, delivers a courtroom speech, a phone began to ring.
Spacey turned to the audience and said: "If you don't answer that, I will!"
The audience applauded Spacey, who remained in character during the interruption.
The House of Cards actor is stepping down from his role at the Old Vic in 2015 to be replaced by Matthew Warchus, the director of Matilda.
In David Rintels' Clarence Darrow, Spacey has returned to a character he has previously played on stage, as well as in a film adaptation for PBS television. But this is his first turn in a one-man play.