English electronic act London Grammar have cancelled their planned headline appearance at Splendour in the Grass.

English electronic act London Grammar have cancelled their planned headline appearance at Splendour in the Grass. Photo: Supplied

Splendour in the Grass organisers must be sick of bands getting sick. Overnight London Grammar have become the third band to pull out of the music festival.

The British three-piece announced on Monday that they had to pull out of the Byron Bay music festival, which kicks off this weekend, and their two sideshows in Sydney and Melbourne "due to illness".

The band didn't specify which member was ill, however, guitarist Dan Rothman recently told AAP that frontwoman Hannah Reid avoids doing interviews to allow the singer to perform at her best.

"I tend to do most of the interviews because the other two, well, Hannah saves her voice and Dot's (keyboards/percussion) just impossible to get a hold of," he said.

The band revealed the news on their Facebook page, posting that it is with "great sadness that we must announce the cancellation of our trip to Australia & Splendour in the Grass this week due to illness".

"This is an incredibly sad situation for us as our last visit was one of the most memorable of our careers, but we do not feel that we can currently deliver the level of performance that you all deserve from us," the band wrote. 

London Grammar performed here earlier this year and said their Australian fans have been hugely supportive of their music from the beginning.

"It pains us to have to disappoint any of you. We are going to do everything we can to make sure we are back down under as soon as possible and will reschedule our Sydney & Melbourne shows and give you more details very shortly," the band's Facebook post read.

Splendour in the Grass organisers are set to reveal a replacement for London Grammar later on Tuesday.

However, the band look set to reschedule their trip Down Under as Splendour in the Grass organisers tweeted on Tuesday that new tour dates would be revealed.

Rothman told AAP that he loved Australia so much he would live here if he could.

"As soon as I got off the plane in Sydney I was completely sold," he said.

"We were there in December/January time and I loved it so much it was just wonderful, I completely fell in love with it," Rothman said.

The band are the third act to pull out of the Byron Bay music festival in a week, after Northern Irish band Two Door Cinema Club and Nashville band The Wild Feathers.

Two Door Cinema Club, who were due to headline on Saturday night, pulled out as lead singer Alex Trimble was hospitalised with stomach problems.

City and Colour, who were second on the bill, will step up into the Northern Irish band's slot while UK band Foals have been drafted in to fill in the rest of Saturday's line-up.

Meanwhile, Australian band Mt Warning will replace The Wild Feathers in their Sunday slot after the band pulled out due to a scheduling conflict.

Last July Lorde joined the festival as an 11th hour replacement for Frank Ocean, who withdrew after injuring his vocal chords.

Splendour In The Grass is set to begin on July 25 in the North Byron Parklands. Tickets are sold out for the three-day festival featuring acts such as Lily Allen, Outkast, Angus & Julia Stone and Vance Joy.

AAP