Australian comedian Adam Hills has shaved his "Brexit beard", 15 months after declaring a self-imposed shaving ban until Britain formally left the European Union.

The host of UK talk show The Last Leg was live on air during a special screening of the show as his fellow hosts Alex Brooker and Josh Widdicombe used electric razors to shave his beard.

Hills then tweeted that he would be selling his beard on eBay with all proceeds to go to Australia's Red Cross bushfire relief fund.

"I’ve spent just over a year growing a beard. I said I would do it until Brexit was sorted, and now it is, kinda," he wrote on the eBay listing page.