The British capital is getting its first 24-hour tube service on the London Underground from tonight.
The first Night Tube will run on the Central and Victoria lines - with services on the Jubilee, Northern and Piccadilly lines following in autumn.
The Night Tube will offer a 24-hour service on Fridays and Saturdays.
Transport for London (TfL) say passenger numbers on Friday and Saturday nights have increased by around 70% since 2000.
The night trains will run on average every 10 minutes across the lines.
TfL say: "We also plan to expand the night time service to parts of the Metropolitan, Circle, District, and Hammersmith & City lines once our modernisation programmes are complete."
"Additionally, services could operate on parts of the London Overground in 2017 and the Docklands Light Railway by 2021."
Night Tube map showing Victoria and Central lines | Image: Transport for London
Passengers are to be charged standard off-peak fares to use the new service, while Day Travelcards are also valid on the day of issue.
Providers say it will cut night-time journeys by an average of 20 minutes, with some cut by more than an hour.
TfL also say the service will play a vital role in opening up London's night-time economy, supporting almost 2,000 permanent jobs.
A new Night Tube logo has been unveiled at Oxford Circus underground station to mark the occasion.
The London Underground, which opened in 1863, carries 1.34 billion passengers a year.
