David took his first-born to the basketball to see the LA Lakers take on Miami Heat, and it was difficult to say who was enjoying the father-son outing the most.
Meanwhile back at home, the rest of the family were getting ready to party.
Victoria posted a picture on Twitter of the family's bulldog Coco wearing a paper hat.
The accompanying caption read: "Coco is celebrating Brooklyn's 13th birthday!!! X vb"
It's hard to believe that 13 years have passed since Brooklyn was born – the first of the Beckham clan.
Back then, 'Posh and Becks' fever gripped England and she was still Victoria Adams – the couple were four months off being married.
Much has changed since then – Victoria has gone from conquering the charts with her career as a Spice Girl to ruling the catwalks as a successful fashion designer.
David has left British football behind and taken the family to their new home of LA – via Spain, where he played for Real Madrid.
And the couple have added to their family with Romeo, eight, Cruz, six, and their seven-month-old daughter Harper Seven.
David and Victoria: A match made in A-list heaven