Legendary guitarist Eric Clapton performed at a private event to help raise $2.2 million for anti-vaccine conspiracy theorist Robert F. Kennedy Jr's presidential campaign, it has been revealed.

Clapton, who is also a vocal anti-vaxxer, played the guitar alongside his band at a private estate in Brentwood near Los Angeles on Monday night.

The fundraiser, where tickets cost up to $6,600 for guests who wanted to meet Clapton, raised $2.2 million - $1 million for Kennedy Jr's campaign and $1.2 million for a PAC supporting the Democrat.