Kelly Osbourne is ‘completely heartbroken’ over the death of Joan Rivers

Kelly Osbourne is “completely heartbroken” over the death of Joan Rivers.

The 29-year-old beauty paid tribute to her Fashion Police co-star in a heartfelt message following the comedienne’s passing on Thursday evening.

She took to her official Facebook page to share her feelings.

Kelly – who has worked with Joan on the show since 2010 – also reached out to the 81-year-old star’s only child, daughter, Melissa, 46, and grandson Cooper, 13.

She went on to shared a petition that has started to declare 4 September national Joan Rivers Day as well as the first time she met the comedienne icon.