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The youngest Jonas Brother arrived in the British capital last month to star as Marius Pontmercy in Les Miserables. He later extended his stay in the city by a further two weeks.
Writing on his Twitter account today, he said: "On my way to the airport. I'm very sad to be leaving London, but I know its time to start a new chapter...
"To all my new friends... I'm gonna miss you all very much. Thanks for the memories. I love you all."
The teenager was spotted at a party to mark his final appearance in the production last night attended by castmates including former X Factor contestant Lucie Jones and actress Samantha Bark.
