UK folk-rockers Mumford & Sons have revealed that their upcoming Glastonbury performance is a 'huge risk', but they're excited about taking the stage at the iconic British music festival.

Speaking to Time Out magazine, the group explained that they have only released two full length albums so playing a live set on the main stage is a daunting prospect:

"It's a really huge deal to headline Glastonbury: we're a young band with only two records behind us. This summer is probably the biggest risk we've ever taken."

Member Winston Marshall added that it almost feels as if they haven't earned a headlining slot yet when they look at other bands topping this year's bill, such as the Rolling Stones:

"I've seen the Stones play for three hours and the crowd knew every song. It's what you want in a headline slot at a festival. I'm scared because it feels like a gamble. We don't know if we've earned it yet or not."

The 'I Will Wait' group's bassist Ted Dwane confessed that just thinking of the legendary Pyramid Stage is terrifying: "Last night was the first time I visualised the Pyramid Stage in my head. I hadn't made that connection before - It's actually real. It's really, really... scary."

Mumford & Sons will perform on June 30 at Glastonbury.

Watch footage of frontman Marcus Mumford playing football in British Columbia here: