United Kingdom, March 23 -- Kelly Osbourne has reportedly split from Sid Wilson.

The former Fashion Police star got engaged to the Slipknot rocker - with whom she has three-year-old son Sidney - at her late dad Ozzy Osbourne's farewell concert in Birmingham last July after three years of dating, but the couple are now said to have gone their separate ways.

Insiders said Kelly has endured a "difficult" month coping with her new life as a single mom while continuing to mourn Black Sabbath rocker Ozzy, who died just two weeks after his final concert.

A source told the Daily Mail online: "Kelly and Sid have decided to call off their engagement.

"Kelly has been struggling following the loss of her father. The grieving process has been incr...