Watch: Jack Black strips off and sings Taylor Swift at Sag-Aftra fundraiser

Jack Black stripped to his underwear and danced on stage at a fundraiser to support crew members amid the Hollywood strikes.

The actor and musician, 54, was one of the performers on the bill at The Give Back-ular Spectacular! Show on Wednesday 25 October at the Orpheum Theatre in Los Angeles.

During the event, Black performed a stand-up set and swiftly ripped clothes off, until he was on stage in just his pants and socks.

He was then seen heading down to “work the crowd” before jumping back on stage to sing and dance, performing some of Taylor Swift’s “Anti-Hero”.

The fundraiser was held in support of film and TV crew members who are struggling financially due to the ongoing Sag-Aftra strikes.