Holly Valance posed with far-right activist Tommy Robinson while attending the anti-immigration rally, Unite the Kingdom.
The former Neighbours star, 42, was photographed with her arm around the controversial former English Defence League leader at the protests in London on Saturday.
Valance, who has become an outspoken supporter of Nigel Farage’s Reform UK party in the past few years, wore a “Mega” (Make England Great Again) hat.
The Australian singer and actress praised Robinson’s “redemption” and claimed the left are “weak and immoral”.
“I'm very proud and pleased for Tommy, this is his redemption. Finally. How the man screaming from the rooftops about the rape of white British girls was framed as 'the bad guy' is going to be a case study,” Valance told the Daily Telegraph Australia.
“How weak and immoral we have become. Our silence is immoral. On Saturday the lions came out.”
She also said she was “still reeling from such a historic moment in British history” and described the crowd singing the hymn Jersulasem as “beautiful”.
“Three million people who love the nation standing together to sing Jerusalem. I'm not going to forget that in a hurry,” Valance said.
The former soap star has increasingly aligned herself with conservative politics since 2022.
She was once photographed with Donald Trump and Mr Farage alongside her billionaire ex-husband Nick Candy - who is the treasurer for Reform UK.
The Kiss Kiss singer made controversial comments about her shift to right-wing politics last year.
"I would say that everyone starts as a leftie,” she said at a Popular Conservatism movement.
“And then wakes up at some point after you start either making money, working, trying to run a business, trying to buy a home, and then realise what crap ideas they all are. And then you go to the right."
Valance was one of several celebrities at the Unite the Kingdom rally. Laurence Fox, Katie Hopkins, and Ant Middleton all marched and gave speeches at the event.
Violence erupted in central London as the rally descended into attacks from flag-wearing thugs on police and counter-protesters.
At least 26 police officers were injured as they faced “significant aggression” from protesters, Scotland Yard said.
Whipping up the crowd were right-wing figures, many of whom are actually American. Elon Musk appeared via video link to address Robinson’s supporters.
“There’s this genuine risk of rape and murder and the destruction of the country and the dissolution of the entire way of life,” the world’s richest man said.
“The left is the party of murder and celebrating murder. I mean, let that sink in for a minute, that’s who we’re dealing with here.”
No10 on Monday criticised the “dangerous and inflammatory” language used by Musk.
More than a hundred helmeted officers backed up by dozens of police horses rushed at the last of Robinson’s supporters after between 110,000 and 150,000 people took part in the march.
