Victoria Beckham has congratulated her eldest son Brooklyn Beckham on his 23rd birthday – his last one before he marries his fiancée Nicola Peltz later this year.MORE: Victoria Beckham teams up with son Romeo and you should see her PVC trousersTaking to Instagram, the mother-of-four shared a never-before-seen family picture showing her holding Brooklyn as a baby whilst he eats a banana.WATCH: David and Victoria Beckham surprise son Cruz with EPIC birthday cakeThe snap seems to have been taken during a family holiday in an exotic destination, as it shows the mother-and-son duo on the beach, with Victoria looking stunning in a black bikini.READ: Brooklyn Beckham and Nicola Peltz get matching treatments ahead of weddingRELATED: Brooklyn Beckham's fiancée Nicola Peltz talks 'falling in love' in emotional update"23 years ago today my life changed forever, I felt a love impossible to explain. Brooklyn, you have no idea how much we all love you.