Black Sabbath and Arctic Monkeys are currently being rumoured to be headlining next year's Reading and Leeds Festival, Gigwise reports. Earlier this week, Festival Republic Boss and R&L organiser told NME that "two out of three" of next year's bill-toppers were booked, and that "both of the headliners have played before." When asked about clues about the acts booked, Benn replied: "They are bands actually. They are American and English. They may even be bands with members from both sides of the pond in them. Two of the three are booked and I'm very happy with them. It's great to be in that position in September. We'll hope to have the third name booked by the end of October but we haven't made an offer yet." This has sparked rumours that the two acts are Arctic Monkeys and Black Sabbath. Arctic Monkeys last headlined Reading and Leeds in 2009, while Black Sabbath topped the line-up back in 1983. Ozzy Osbourne and co also match Benn's pan-American description, as Sabbath's new drummer Tommy Clufetos is from the States. The website eFestivals is also listing Arctic Monkeys as a rumour. Arctic Monkeys enjoyed a successful summer headlining Glastonbury Festival before releasing their record-breaking fifth album, AM." Black Sabbath also released the critically acclaimed "13," after returning to the metal scene to headline Download Festival in 2012. Other rumours for next year's headliners include Slipknot and Kasabian. Reading & Leeds 2014 will take place next summer from Friday 22 - Sunday 24 August.