Lenny Rush is the actor your kid is going to be obsessed with for the next five years, and for good reason: he’s about to give the Wizarding World its most human version of Dobby yet. While most people know him as the breakout star of the Ncuti Gatwa era of Doctor Who, his confirmed casting in the upcoming Harry Potter HBO series cements him as the most important young actor in the current fantasy landscape.
TL;DR: Lenny Rush is a BAFTA-winning teen actor who will play Dobby in the unreleased Harry Potter HBO series. He already has a massive following for his role as the tech-genius Morris in Doctor Who and his hilarious work in Dodger. He brings a sharp, unsentimental energy to every role, making him a rare talent who appeals to both elementary schoolers and cynical teens.
The decision to cast a physical actor for Dobby rather than relying solely on a CGI puppet is a massive signal for the Harry Potter reboot. Rush has a specific kind of screen presence—he’s funny, he’s biting, and he can do "vulnerable" without it feeling like a Hallmark card.
In the original films, Dobby was often used for slapstick or pure pathos. Based on Rush’s previous work, we can expect this version of the house-elf to have significantly more agency and wit. He’s set to bring a level of comedic timing to the role that will likely make Dobby a much more central, relatable character for a new generation of fans. Because the show is still in development, we’re looking at a performance that will likely be the emotional anchor of the early seasons.
If your kid is already a Whovian, they know Rush as Morris Gibbons. He didn't just join the cast; he took over the screen as a scientific prodigy in a high-tech wheelchair. What makes his performance in Doctor Who work is that the show treats his disability as a detail, not a plot point. Morris is the smartest person in the room because he’s a genius, and Rush plays him with a level of confidence that makes the Doctor look like he’s struggling to keep up.
This is the "Lenny Rush Effect"—he has a way of making every character feel like they have a secret they’re not telling you. It’s why he’s a perfect fit for our best shows for kids list; he elevates the material above standard "kid TV" tropes.
Before the big franchise calls started coming in, Rush was already cleaning up at the BAFTAs. He won Best Male Performance in a Comedy Programme for Am I Being Unreasonable?, a show that leans a bit more toward the "parent watch" category but proves he can hold his own against industry veterans.
For a more family-friendly look at his range, check out Dodger. It’s a prequel to Oliver Twist that feels more like a heist movie than a history lesson. Rush plays The Morgan, and he’s frequently the funniest part of an already very funny show. It’s a great pick for middle schoolers who want something with a bit of edge but none of the "preachy" historical drama weight.
If your kid is hyped about Rush’s casting as Dobby, use it as a bridge to talk about how characters are built.
- The "Voice" vs. the "Body": Watch a clip of the original Dobby from The Chamber of Secrets and then watch an interview with Lenny Rush. Ask your kid how they think a real person’s movements will change how we feel about the character.
- The "Genius" Trope: In Doctor Who, Morris is a tech wizard. Ask your kid which other "smartest person in the room" characters they like (think Shuri from Black Panther or Donatello from TMNT) and where Morris fits in that lineup.
The one thing to keep in mind with Lenny Rush is that his talent often leads him into "older" content. While Dodger and Doctor Who are safe bets for the 8+ crowd, his award-winning turn in Am I Being Unreasonable? is a dark comedy with adult themes. It’s excellent, but it’s one you’ll want to vet or save for your own late-night viewing.
Q: Who is Lenny Rush playing in the new Harry Potter show?
He is officially confirmed to play Dobby the House-Elf. Unlike the movies, which used a CGI model voiced by Toby Jones, this version will feature Rush’s physical performance, likely using a mix of prosthetics and motion capture.
Q: Is Lenny Rush in Doctor Who?
Yes, he plays Morris Gibbons, a recurring character introduced in the 2024 season. He is a tech genius who assists the Fifteenth Doctor and is a major fan favorite.
Q: What age is Lenny Rush's work appropriate for?
Most of his mainstream work like Dodger and Doctor Who is perfect for ages 8 and up. His breakout show, Am I Being Unreasonable?, is intended for adults and has a much darker tone.
Lenny Rush is a generational talent who is effectively rebranding what a "child star" looks like. He’s moving away from the polished, stage-school vibe and toward something much more interesting and authentic. Whether he’s outsmarting Time Lords or preparing to be the heart of a new Harry Potter era, he’s an actor worth following.
