Also confirmed are Trentemoller, 67, Afenginn, Angel Olsen, G-Eazy, Gangly, Hieroglyphic Being, Jenny Hval, Marching Church, Mats Gustaffson's Nu Ensemble "Hidros Zap", Of Mice & Men, Pig Destroyer, and Romperayo.
Now in it's 47th year Roskilde is continental Europe's biggest festival, and offers a variety of international acts and four days of music showcasing175 acts from Saturday 24th June until Saturday 1st July 2017.
Tickets are due on sale later this year.
Accommodation add-ons are also available including a tent that is pitched for you, special tent houses with electricity or a rockwool-insulated shelter that protects against heat, cold, water and sound.
Head of Programme Anders Wahrén said, "Moderat and Modeselektor share band members, but they've actually never performed together. So this will be an "only at Roskilde" experience when they join forces for a three-hour long electronic club night on Orange Stage.
"Trentemøller has enjoyed several successful shows on Orange Stage, but this time he has asked to play the smaller Arena stage, which we think is a good fit. The audience can expect a different sort of intensity with him and his band this time around.
"The first 14 acts range from distinctive voices such as Angel Olsen and Jenny Hval to a defining act like Pig Destroyer who rarely play in Europe. In many ways, Roskilde Festival is about discovering the music you didn't know you were going to love, and even with more than 160 acts yet to be announced, next year's festival is sure to offer both headliners and bands that are ready to break through to a wider audience."
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