The singer and his producer, Timbaland, will join Duran Duran for a concert at Wembley Stadium on Saturday, July 7.
Timberlake has been a fan of the 1980s band for a long time, and worked with them on his latest album.
A source told Britain’s The Sun, "Justin and Timberland have been rehearsing. They have something special up their sleeve for fans at Wembley. They are juggling their schedules to make it happen."