United Kingdom, July 5 -- Harper Beckham's upcoming 15th birthday has reportedly become another painful reminder of the ongoing rift within the Beckham family.

Sources claim the teen's parents Sir David Beckham and Lady Victoria Beckham fear their daughter will again miss hearing from her estranged eldest brother, Brooklyn Beckham, when she turns 15 on Friday (10.07.26.)

Harper is said to have remained close to Brooklyn, 27, before he announced he wanted to become estranged from his family, but it's believed she has not spoken to him since the dispute escalated last year.

According to the Daily Mail, a source said: "Harper is heartbroken and devastated at her brother's decision not to speak to her and now her birthday is just days away...