Who played the young tom riddle in harry potter?
In "Harry Potter and the Philosopher's Stone", Voldemort's manifestation is as a face on the back of Quirrell's head, an effect achieved by computer generated imagery. Ian Hart, the actor who played Quirrell in the same film, provided the voice and the facial source for this character. Voldemort also appears in a scene in the Forbidden Forest where he is seen drinking the blood of a unicorn. As Voldemort's face was altered enough by CG work, and Hart's voice was affected enough, there was no confusion by Hart's playing of the two roles. In that film, he was also shown in a flashback sequence when he arrived at the home of James and Lily Potter to kill them. In this scene Voldemort is played by Richard Bremmer, though his face is never seen. His next appearance would be in "Harry Potter and the Chamber of Secrets" as the 16-year-old Tom Marvolo Riddle (portrayed by Christian Coulson).
Who played the teenager Tom Riddle in the film Harry Potter and the Chamber of Secrets?
Christian Coulson
Lord Voldemort
Fiennes's nephew, Hero Fiennes-Tiffin, portrayed Tom Riddle as a child in "Harry Potter and the Half-Blood Prince". By the time filming arrived Christian Coulson was 29, and not considered suitable to return as the adolescent Riddle. Thomas James Longley was originally scheduled to take over the role, but last minute renegotiations saw Frank Dillane cast instead.
Who played the Tom Riddle as a child in the 6th Harry Potter film?
Hero Fiennes-Tiffin
Lord Voldemort
No context provided
Who played the Tom Riddle as a teenager in the 6th Harry Potter film?
Frank Dillane
Lord Voldemort
https://en.wikipedia.org/wiki/Lord%20Voldemort
 played by Ralph Fiennes
Lord Voldemort
He also portrayed 11-year-old Tom Riddle, the young version of the antagonist Lord Voldemort, in the film Harry Potter and the Half-Blood Prince
Hero Fiennes Tiffin
and for playing 16-year-old Tom Riddle in the film Harry Potter and the Half-Blood Prince (2009)
Frank Dillane
Christian Coulson played 16-year-old Tom Riddle in the film Harry Potter and the Chamber of Secrets. Then, in Harry Potter and the Half-Blood Prince, two actors played young Tom Riddle. The nephew of Ralph Fiennes, Hero Fiennes-Tiffin, portrayed 11-year-old Tom Riddle in the film, while Frank Dillane played 16-year-old Tom Riddle. Christian Coulson, who played Tom Riddle in Harry Potter and the Chamber of Secrets, was now 29 years old. Therefore, he was not considered suitable to return to the adolescent role of Tom Riddle in Harry Potter and the Half-Blood Prince.