David Beckham Shares Sweet Throwback Photo for Romeo's 19th Birthday: 'Keep Being You'

Victoria Beckham Instagram

Romeo Beckham is "almost" a man, dad David Beckham jokes in a sweet birthday tribute.

Marking his 19th birthday Wednesday, Romeo received messages from his family, including his parents. David, 46, shared a throwback photo of himself kissing Romeo as a child, writing in the caption, "Happy 19th birthday to my beautiful boy."

"Have the most amazing day we love you so much and are so proud of the man (almost) that you have become," the former soccer star added. "Keep being you and never change (apart from the team you support) Love you Ro Ro Love always Dad."

Mom Victoria Beckham shared a recent snapshot of Romeo, writing, "Happy birthday @romeobeckham! Can't believe you are 19 today!! 🥳🎉🎈💕 We all love you so so much xxxxxx I love you @davidbeckham x."

Romeo replied in the comment section with a series of heart emojis under both posts.

David and Victoria celebrated Romeo's birthday at David Grutman's Sushi Fly Chicken (SFC) in Miami Beach, Florida, later on Wednesday. "Romeo was presented with a massive eight-tier birthday cake adorned with family photos, jerseys, soccer balls, and the Inter Miami CF logo representing his father's soccer team. He loved it," a source tells PEOPLE.

Victoria, 47, and David also share sons Brooklyn Beckham, 22, and Cruz, 16, plus 10-year-old daughter Harper Seven.

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In a previous interview with The Father Hood, David opened up about becoming a dad "at a very young age."

"I think you mature quicker with kids. You have more important things in life to worry about than your everyday worries, and life becomes all about the kids," he said at the time. "I think that's what you learn as a father - you become less important and it's all about your children."

Also in the interview, David went on to share how his own dad, Ted, inspires him in his parenting.

" 'Never give up, no matter what.' That was one of the things that my dad would always say to me. If I got a kick in a game, I'd look over to him and he'd be like, 'Get up! Get up! Don't show people that you're hurt!' There was a steeliness that he kind of instilled into me on that side," he said. "It actually made me stronger as a person."