It's a book about a boy who starts learning acrobatics from a man when he's very little, I think it was a family friend or an employee. Possibly called Mario? Definitely non English although the boy is English and I think the story is set in England.
Then later he goes to take ballet and falls in love with it. But his dad finds out and is super angry and embarrassed. Then the dad goes to watch him practice and is amazed at how powerful and strong the boy is.
There's also a mum, and possibly some sisters.
It's NOT Billy Elliott.
I have searched on Amazon, good reads etc... I'm usually really good at finding books but I just can't.
At the end the boy grows up and is a really great dancer and his dad is proud of him.