When your mum and dad are Posh and Becks it kind of takes a lot to steal a headline from them. But Romeo Beckham, 12, figured out a way to do it on Sunday morning (Apr. 26) when he crossed the finish line at the London marathon as his famous parents and siblings cheered him on.

Romeo ran the children's mini-marathon race to raise money for UNAIDS and the 7 Fund, his dad's collaboration with UNICEF to help support children living in dangerous areas across the globe. "Well done Romeo!! We r all so proud!!," Victoria Beckham wrote. "Running @londonmarathon for UNAIDS and 7 Fund x vb."

Of course the family -- including brothers Brooklyn and Cruz -- drew up some signs to cheer him on as they sported their matching "Team Romeo" t-shirts.

Here's a full shot of their team gear.

Romeo posted some pics of his post-run look also.

And Brooklyn cheered his brother for raising more than $9,100 for charity.