Bindi Irwin has started dating boxing champion Muhammad Ali’s grandson, it has been reported.

The 11-year-old wildlife warrior, whose father is the late Steve Irwin, has reportedly begun referring to Jacob Wertheimer as her “boyfriend”.

A friend of the Irwin family told Woman’s Day magazine: “During the last year Bindi has started calling Jacob her boyfriend. They’ve known each other for years. They’ve been writing to each other since they were young.

“I’ve seen them on the red carpet and even [Bindi's mum] Terri calls Jacob Bindi’s boyfriend.”