Hero Fiennes-Tiffin is Ralph Fiennes’s nephew. Their connection on screen is also family-related in a different sense: Hero played the younger Tom Riddle in Harry Potter and the Half-Blood Prince, while Ralph played the adult Lord Voldemort across the franchise. The two never played the same version of the character in the same role, so “both starred as Voldemort” is only accurate if “Voldemort” is read as the character’s whole life, from boy to Dark Lord.
The family tie
The BBC America profile of Ralph Fiennes identifies Hero Fiennes-Tiffin as his nephew and names him as the actor who played Tom Riddle in Half-Blood Prince. BBC America, “10 Things You Never Knew About Ralph Fiennes” is the clearest English-language statement of the kinship. A 2022 RTVE interview, published on 23 August 2022, also calls Hero Ralph’s nephew and describes his role as the young Voldemort. RTVE, “‘After’ Hero Fiennes Tiffin”
The family path runs through Hero’s mother, Martha Fiennes, who is Ralph’s sister. Beyond that shared family line, the sources available for this article do not describe how often the two work together, how close they are, or whether Ralph advised Hero on the part. Those details should not be assumed from the family relationship or from their shared franchise connection.
Their roles in the films
The two roles sit at different points in the same character’s life. Tom Riddle is Voldemort’s birth name and earlier identity, so the actors are linked through one character rather than through a matched scene or a shared performance.
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| Actor | Character portrayed | Where it appears | Source |
|---|---|---|---|
| Hero Fiennes-Tiffin | Young Tom Riddle (the younger Voldemort) | Harry Potter and the Half-Blood Prince | BBC America; RTVE (2022) |
| Ralph Fiennes | Lord Voldemort (adult Dark Lord) | Harry Potter film franchise | Wizarding World official feature |
The Wizarding World’s official feature on the franchise’s actors describes Ralph’s role as Lord Voldemort across the series. Wizarding World, “Actors of the Wizarding World Part Three: The household names” The sources do not describe a scene in which both actors appear together as the same character, so avoid describing one.
What Ralph Fiennes has said about the role
The Wizarding World feature quotes Daniel Radcliffe discussing Ralph’s work: “Ralph genuinely scared me for a few years.” That remark concerns Ralph’s effect on his co-star in the role, not Hero or the family relationship.
Rank #2
![Harry Potter: 8-Film Collection [4K Ultra HD + Blu-ray]](https://m.media-amazon.com/images/I/514OqH0FqSL._SL160_.jpg)
- Harry Potter: 8 Film Collection (4K)
The same page reproduces Ralph’s description of playing Voldemort: “It can be thrilling and quite freeing to play, because all the rules disappear.” The page attributes the remark to Fiennes and references his comments to The Guardian. The original interview was not checked for this article, so treat the wording as the one published on the franchise page rather than a verified transcript of the newspaper piece.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the sources do not establish
- How close Ralph and Hero are in private life, or how often they spend time together.
- Whether Ralph gave Hero advice on playing Tom Riddle.
- Any casting-process detail that connects the two performances beyond the credits.
- Any statistic about the relationship or the roles; none was found in the sources reviewed.
Read the answer as a family fact plus a character link: Hero is Ralph’s nephew, and their Harry Potter roles are two stages of the same character.
Quick Recap
Rank #4
![Harry Potter: The Complete 8-Movie Collection (Deluxe 16-Disc Box Set / Special Bonus Features) [Blu-ray] [Region Free]](https://m.media-amazon.com/images/I/5113Nsjd8NL._SL160_.jpg)
- Harry Potter and the Philosopher's Stone (152 mins) – The magical adventure begins as Harry arrives at Hogwarts.
- Harry Potter and the Chamber of Secrets (161 mins) – Flying cars, deadly secrets, and an ominous warning await in Harry’s second year.
- Harry Potter and the Prisoner of Azkaban (142 mins) – Dementors arrive and Harry uncovers a mysterious connection to a dangerous prisoner.
- Harry Potter and the Goblet of Fire (157 mins) – Deadly tournaments and the rise of Lord Voldemort put Harry to the ultimate test.
- Harry Potter and the Order of the Phoenix (138 mins) – As few believe Voldemort’s return, Harry must secretly prepare his friends for war.
Rank #3
- 11-Film Collection
- Blu-ray
- Bonus Content
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