Niall Horan, The Shires, J Hus and Orbital are among the acts to be added to the line-up for BBC Music’s The Biggest Weekend.
The four-day festival is staged on the late May bank holiday weekend (25-28 May) over four sites in four nations.
The newly announced acts also include: Jess Glynne, Paloma Faith, James Bay, Craig David, Franz Ferdinand, Amy MacDonald, Goldie, Years & Years, First Aid Kit, Wolf Alice, Young Fathers, Little Dragon and Breeders.
The Radio 1/1Xtra/Asian Network site in Swansea will feature both Taylor Swift and Ed Sheeran. Other previously announced artists include Noel Gallagher’s High Flying Birds, Manic Street Preachers, Simple Minds and Courtney Barnett.
Performances will be screened across BBC radio and TV networks.
The Biggest Weekend will have 175,000 tickets available through Ticketmaster from February 12.