Hoards of fans of the Coachella Valley Music and Arts Festival have confessed to not knowing who headliners The Stone Roses are.

The line-up for the California festival, which takes place over two weekends in April (12-14 April and 19-21 April), was announced earlier today. The Stone Roses are co-headlining the opening night alongside Blur.

Following the announcement, hosts of people took to Twitter to ask who The Stone Roses are, leading to the creation of a Tumblr blog, called Who Are The Stone Roses?, which has collated a number of the confused tweets from American fans of the festival, such as:

The annual US event marks The Stone Roses first American gigs since reforming in 2012. 

Also performing on the Friday of the festival will be Yeah Yeah Yeahs, Johnny Marr, Lou Reed, Modest Mouse and Jake Bugg. 

Phoenix will be the festival's second headliner, appearing on a bill which also includes The xx, Postal Service, Sigur Ros, New Order, Hot Chip, Grizzly Bear, Two Door Cinema Club, Biffy Clyro, Foals and Franz Ferdinand. 

The third and final Coachella headliner for 2013 will be Red Hot Chili Peppers. The veteran rockers will close the festival on both weekends, topping a bill which also includes Nick Cave & The Bad Seeds, Vampire Weekend, Jessie Ware, Tame Impala, James Blake and Grimes. 

As expected, The Rolling Stones will not be appearing at the festival. Speaking to NME exclusively to deny the rumours linking the band to the festival, Mick Jagger said: "We're not gonna do Coachella, 'cos it's too early. There was a rumour we were gonna do that one, but it's very early, Coachella. It's April or something, isn’t it? And we're not gonna be ready to go by April. But we're not gonna stop."