Tinie Tempah, Bastille, Avicii to play iTunes Festival

Tinie Tempah will headline iTunes festival at London's Roundhouse on 26 September.

The 24-year-old has been added to the line-up of the month long event that already includes Elton John, Robin Thicke and the Kings of Leon.

The rapper said: "I'm excited to be back at the iTunes Festival with a whole bunch of new music. It's going to be crazy."

Others acts added include Lawson, Janelle Monae and Palma Violets.

Also joining the bill at the free music event will be Bastille, who have their own headline slot on 8 September.

The band supported Emile Sande during last year's festival. Frontman Dan Smith says he's looking forward to the crowd knowing who he is this year.

"Last year we were massively distracted by seeing ourselves on giant TV screens for the first time! Hopefully this year, the crowd will also know some of our songs."

Other names announced include Jimmy Eat World, French Soler and Chic ft. Nile Rodgers who recently got the all clear from cancer.

Swedish producer Avicii, whose single Wake Me Up is fastest selling single of the year so far, is playing on 13 September.

He said he is "really looking forward to being back in London".

Manchester band The 1975 have been announced as the opening act for Bastille while Drenge will support Arctic Monkeys on 9 September.

Justin Timberlake, Jessie J, Queens of the Stone Age and Thirty Seconds To Mars have already been announced as performers at Camden's Roundhouse.

The current line-up is as follows:

Sigur Ros + Polica - 2 September

The Lumineers + Phox - 3

Paramore + Fenech-Soler - 4

Rizzle Kicks - 5

Queens of The Stone Age + Palma Violets - 6

Phoenix + Little Green Cars - 7

Bastille + The 1975 - 8

Arctic Monkeys + Drenge - 9

Jake Bugg + Valerie June - 10

Kings of Leon + Jimmy Eat World - 11

Elton John + Tom Odell - 12

Avicii - 13

Chic ft. Nile Rodgers + Janelle Monae - 14

Vampire Weekend + The Olms - 15

Jack Johnson + Bahamas - 16

Ludovico Einaudi - 17

Thirty Seconds to Mars + The Family Rain - 18

Primal Scream - 20

Jessie J + Lawson - 23

Pixies + No Ceremony - 25

Tinie Tempah - 26

John Legend + Robin Thicke - 28

Justin Timberlake - 29

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