LCD Soundsystem and Major Lazer will headline this year's Lovebox Festival.
Major Lazer, fronted by Diplo and Switch, will top the bill on 15 July, with the recently reformed New York group closing the festival the following night.
Although being named headliners for other festivals including Coachella and Primavera, LCD Soundsystem's set in Victoria Park will be a UK exclusive.
Major Lazer will play at Spain's Benicassim and Longitude in Dublin.
They're also set to be one of the first major US acts to perform in Cuba since relations between the two countries eased.
The announcement of their gig, which is scheduled for March, came after last summer's reopening of the US embassy in Havana after years of hostility.
LCD Soundsystem called it a day five years ago with a massive concert at Madison Square Garden, which was turned into a live album and documentary.
The group reunited on Christmas Eve after releasing a track called Christmas Will Break Your Heart which was described as a "depressing Christmas song" that had been on the back burner for the past eight years.
Frontman James Murphy appeared at the festival last year as part of the Despacio Soundsystem which he put together with 2manydjs.
Last year's Lovebox, which is held in Victoria Park, east London, was headlined by Rudimental and Snoop Dogg.