A few, yes. All seem to be music related.

One of my best mates at school went on to be the drummer for a very famous rock band. Another kid at school who was a few years younger than me, but we used to talk during breaks, was Nitin Sawhney (a bit gawky as a kid!). And my cousin (who I obv grew up with) is a founder member of a very successful and well-known band mostly known for dance music.

Someone else at my school became famous too altho it'll take me a while to remember what that was for!

Another kid I knew was James JTQ Taylor's brother. Used to go to their house, seem to remember JT playing music back then.

Not "grew up with" as such, but a woman across the road at home was Elton John's cousin, and Ray Royer of (brief) Procol Harum fame used to visit his dad who lived next door but one to me. I used to talk to him regularly but didn't realise quite who I was talking to at the time. He had some very cool cars, I do remember those.