In a video-recorded statement, Greg Page said he had been suffering a condition called orthostatic intolerance that had left him debilitated.

“It means that I’ll no longer be able to sing and dance as I want to and as a result I’ve decided to stop performing with The Wiggles,” said Page, 34, who is known for his bright yellow T-shirt.

Page was replaced by understudy Sam Moran when he pulled out of The Wiggles’ U.S. tour in July. It was recently reported that he needed to rest and seek medical advice for the fainting spells.

Page helped found The Wiggles in 1991 after he and two other members met while studying early childhood education at Sydney’s Macquarie University.

The Wiggles were Australia’s top-earning entertainers last year, ahead of No. 2 AC/DC and No. 3 Nicole Kidman.

The children’s group featuring four men in brightly colored T-shirts and a cast of characters including Dorothy the Dinosaur and Wags the Dog had a gross income last year of 50 million Australian dollars.

The group has franchised its enormously popular recipe to several non-English speaking countries, including Taiwan.