London Mayor Sadiq Khan has announced that trains on parts of London Overground network will run through the night on weekends by the end of the year.
This will see train services run round the clock on Friday and Saturday nights from December.
Passengers will be able to take 24-hour trains to the East of London by connecting with Night Tube services, which launched on the London Underground in August last year.
Under the current schedule, overground trains stop shortly after midnight.
Mr Khan said: "Our Night Tube services have been a real success right across the capital, so I'm delighted to announce that we'll be bringing the Night Overground to the east London line later this year.
"It will provide huge benefits to Londoners and visitors to our city, helping those working hard through the night and all those out enjoying everything London has to offer, as well as creating jobs and boosting our economy."
Initially, all-night Overground services will run between New Cross Gate and Dalston Junction before extending to Highbury and Islington next year.
Seeing as most Overground trains operate on Network Rail tracks, which are also used by other train companies and freight services, only a small portion of the network will be included in the project.
Jonathan Fox, TfL director of London rail said: "The east London route is one of the most popular parts of the London Overground network, particularly late in the evening.
"Expanding night services to this key part of London Overground will make it easier for customers to enjoy the vibrant night-time culture that east London has to offer, supporting the economy in this much-loved area of the capital.
"The Night Tube has already provided a boost to our economy and supported thousands of permanent jobs. We hope the Night Overground will build on this success even further."
The Night Time Industries Association which represents bars and nightclubs has welcomed the move.
Chairman Alan Miller said: “London is making significant strides to become a smart, future-oriented 24-hour city in which transport is a vital component."
Currently, all-night Tube services operate on the Victoria, Piccadilly, Northern, Jubilee and Central lines. Modernisation programmes for the network will be completed in 2023, which will see parts of the Metropolitan, Circle, District and Hammersmith & City lines added to the plans.