Bob Geldof's daughter Fifi is engaged.

The 31 year old, Geldof's eldest daughter, is set to wed her 33 year old busker beau Andrew Robertson.

She took to to post a close-up photo of her left hand, showing off a sparkling diamond ring on her ring finger, along with the caption, "The ring #boydonegood."

She follows in the footsteps of her famous father, who is also planning to walk down the aisle with his long-term girlfriend, French actress Jeanne Marine.

The happy news is a welcome reprieve for the family, who are mourning the loss of Geldof's 25-year-old daughter Peaches, who died at her home in Kent, England in April (14) after taking heroin.