Tom riddle didn't grow up like Voldemort. You mean the young Voldemort (that is, the human one) That's Ralph Ralph Fiennes. He appeared in Harry Potter and the Goblet of Fire and Harry Potter and the Order of the Phoenix.

But so far, four (or five) people have played Voldemort.

Richard Bremmer in the first film, although he is just that face ~ ~

Christian coulson in the second film, tom riddle when he was young.

The fourth film begins with Ralph Vannes playing the resurrected Voldemort.

In the sixth part, Fiennes Tiffin, the hero, plays tom riddle as a child.

In the sixth film, Frank Dillane plays tom riddle as a young man.

I hope I can help you ~