Victoria Beckham was one proud mum as her son Romeo turned 20 on Thursday and has since given fans a glimpse at his incredible birthday cake.MORE: Victoria Beckham shares moving message after close friend loses husbandThe masterpiece was a whopping five-tired creation and themed around her son's football team InterMiami. Each tier featured at least one of the teams' colours - pink, white or green - and was adorned with footballs and intricate illustrations.WATCH: Romeo Beckham looks just like Harper in unseen photosCaptioning a photo of Romeo posing with the cake, the fashion mogul penned: "Last night celebrating @romeobeckham."READ: Romeo Beckham's guilty pleasure revealed – and it's not what you'd expectSEE: Victoria Beckham reveals favourite hangover cure – and it's so unexpectedThe bottom layer of the cake featured multiple photos of Romeo, whilst the next layer up was designed with fabulous pinstripes in his team colours with the words "Happy Birthday Romeo," written on them.