5 Seconds of Summer have spoken of their excitement at performing at the iTunes Festival.

The Australians are due to headline London's Roundhouse venue tonight (September 4) as part of the month-long series of live music.

Speaking to Capital FM today, the band opened up on their bulging excitement ahead of the show.

Calum Hood said: "When we first came over to England about two-and-a-half years ago, it was the first day and we went and saw Muse play at the Roundhouse for iTunes Festival. So it was kind of our first introduction to England on the gig scene."

Luke Hemmings added: "If it's got our fans, it's going to be awesome. We just want to put on a good show for them."

Hood interjected: "We don't over think it - hopefully the fans come with the energy. It's going to be wicked!"

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Watch 5SOS perform for Radio 1's Live Lounge today: