Zara Holland, who was crowned Miss Great Britain 2015/2016, has been stripped of her title after engaging in sexual activities on the ITV2 show Love Island.
In a statement posted on Thursday evening from Miss Great Britain's official Twitter account, the organisation expressed "deep regret" at having to dethrone Holland. It said it "cannot promote Zara as a positive role model".
"We wholly understand that everyone makes mistakes, but Zara as an ambassador for Miss Great Britain, simply did not uphold the responsibility expected of the title," the organisation said.
She will no longer compete in the Miss World competition and runner-up Deone Robertson will go in her place.
A spokesperson for the show told The Telegraph Holland had not yet been informed of the decision.
This isn't the first time a winner has been stripped of their Miss Great Britain accolade. In 2006, Danielle Lloyd had to hand back her crown after appearing in an issue of Playboy.
The entry requirements stipulate that contestants "must not have posed nude or topless in any publication".