Sisters Michelle and Lavinia Osbourne are twins with different fathers — something so rare that it’s never been documented before in British history and only 20 times in the entire world.

“I’m still in amazement that this can actually happen – it’s super weird, super odd, super rare – but, if I apply it to myself, it makes sense,” Michelle, 49, told The Guardian.

The women — born to a 19-year-old who drifted in and out of their lives — had a difficult childhood in which they clung to one another.

Michelle and Olivia had a ball celebrating their 30th birthday in Marrakech, Morocco in 2006. Courtesy of Lavinia Osbourne

“There’s twin magic. It does exist — it’s a thing,” Michelle said.…