Night Tube to begin on Piccadilly line in December
The Night Tube will be launched on the Piccadilly line on 16 December, London mayor Sadiq Khan has announced.
It will be the fifth line on the London Underground to have a 24-hour weekend operation once the service, which started in August, begins on the Northern line on 18 November.
The Central, Victoria and Jubilee lines all currently have 24-hour Tube trains.
The mayor said the service had "exceeded expectations with more than one million journeys made already".
Night Tube trains on the Piccadilly line will run about every 10 minutes between Cockfosters and Heathrow Terminal 5.
However, there will be no service on the Terminal 4 loop or between Acton Town and Uxbridge.
According to City Hall, the introduction of the Night Tube is expected to boost London's night-time economy by £77m a year and support around 2,000 permanent jobs.
Julian Bird, chief executive of the Society of London Theatre, said the Night Tube had "already proven to be a tremendous asset to the industry" helping both staff and audiences.
Nica Burns OBE, owner of the Palace Theatre, where Harry Potter and the Cursed Child is currently playing, said it was "fantastic that the theatre community will be able to relax after a show without the expense of a car home".