Kelly Osbourne told her dad Ozzy to have an ''amazing night bumping uglies'' with her mother Sharon on their wedding anniversary.

The 28-year-old star's parents celebrated 31 years of marriage on Thursday (04.06.13) - after tying the knot on the Hawaiian Island of Maui on July 4, 1982 - and Kelly sent them a message wishing them a happy day and urging them to get steamy in the bedroom.

The 'Fashion Police' star - who is on vacation - posted a text message she sent to Ozzy on her Twitter page, which read: ''I miss you so much happy anniversary Dadda. I hope you have an amazing night bumping uglies with mum! I'm having the best time on holiday wish you and mum were here. (sic)''

Earlier, she tweeted a happy anniversary message, which said: ''Happy 31st Anniversary Mum & Dad heres to the next 31 year of insane love I adore you both so much!!!! (sic)''

Kelly attached a picture of the pair on their wedding day, in which Sharon, who is dressed from head to toe in white, is looking up at Ozzy who is also in a white suit.

Her brother, Jack Osbourne, 27, joked: ''O yeah and happy anniversary mum and dad. @MrsSOsbourne @OfficialOzzy wot was it like getting married when dinosaurs roamed the planet? Haha (sic)''

Sharon and Ozzy - who renewed their vows in 2003 - went through a rocky patch earlier this year when the Black Sabbath singer relapsed into drink and drug use.

They spent weeks living apart as Sharon focused on her TV work and Ozzy prepared for the Black Sabbath reunion tour.

Since then they have reconciled and last month Sharon revealed her husband has been sober for several months.