Last week it was reported that Coldplay will be topping the bill on the Saturday night (although it's yet to be confirmed).
And now the Irish rock band and US R&B star have also been named as rumoured headliners at the three-day event, by Holy Moly.
U2 were due to perform at the festival last summer, but had to pull out when frontman Bono injured his back. Bey's husband Jay-Z previously headlined in 2007.
Glastonbury Festival runs June 22-24 and tickets are sold out.