The cast of HBO's Harry Potter reboot already looks older for Season 2 (and it's for the best). The debut season of the HBO Harry Potter series will introduce Dominic McLaughlin's Harry Potter, Arabella Stanton's Hermione Granger, and Alastair Stout's Ron Weasley as the new core trio of the franchise, and they will start their journey in Hogwarts at an age the books actually require: 11 years old. HBO had a clear strategy in mind during the casting process, looking for young, talented actors while betting that this same trio could grow with the story over seven seasons.
HBO already renewed Harry Potter for Season 2, which will focus on the Chamber of Secrets storyline and have the trio aged up to 12 (the exact age they are in the book). HBO's strategy is set to pay off in the sophomore season, but it came with a strict production schedule to achieve the desired look so they will still look 12 years old on-screen.
Harry Potter Season 2 began filming in August 2026, months before Season 1's Christmas Day premiere. This is a deliberate decision so that the core trio would still look like second-years instead of kids who had already outgrown the story. This production schedule and renewal timeline set a precedent for how HBO plans to stack future seasons of Harry Potter tightly.
The official press tour photos for Harry Potter and the Philosopher's Stone (via Screen Pulse) revealed the first clear look at the aged-up core trio of the reboot, showing how Dominic McLaughlin, Arabella Stanton, and Alastair Stout will appear as 12-year-olds heading into their second year at Hogwarts.
There is a clear difference between the cast's first official look from the Season 1 casting announcement and the press tour looks taken from Season 2's filming. The core trio looks taller. Stanton's hair is longer and heavier, McLaughlin's face lost the roundness that will define his Season 1 look, and Stout's cheeks sharpened (a primary indicator of facial aging).
The plan is going well for HBO's Harry Potter series. The studio is on the right track if it continues to follow its seven-season plan of ensuring the actors won't age out of their roles.
Harry, Ron, and Hermione at 11 and 12: HBO Cast vs the Films
Dominic McLaughlin - Harry Potter
Age while filming:
- Season 1 (started July 2025) - 11
- Season 2 (started August 2026) - 12
Dominic McLaughlin was born on January 1, 2014, and was 11 when HBO announced him as the new Harry Potter in May 2025. McLaughlin was roughly the same age as Daniel Radcliffe when he began shooting Harry Potter and the Sorcerer's Stone in September 2000.
Warner Bros. used a similar strategy with its production schedule for Chamber of Secrets, starting filming (via Daily Sun) just days after the release of The Sorcerer's Stone. Production began in late November 2001 and wrapped in July 2002. Radcliffe (who was born on July 23, 1989) was 12 years old when filming began, turning 13 near the end of the Chamber of Secrets' production schedule.
The fact that Radcliffe was already nearly 13 by the time the second film wrapped made it clear that HBO was right on schedule before filming for the third book ensued.
In comparison, McLaughlin is filming a good chunk of Season 2 at 12 years old, before turning 13 on New Year's Day 2027. Filming for Season 1 began in July 2025 and wrapped in May 2026 (via ScreenRant). The lengthy schedule makes sense because of its eight-episode structure. This means that McLaughlin would be 13 years old toward the end of Season 2's production, setting up a clear transition for his age and story in The Prisoner of Azkaban.
Harry's storyline in Chamber of Secrets involves many ups and downs, such as being rescued by Ron and his brothers from the Dursleys via their flying Ford Anglia, encountering the giant spider Aragog, and becoming the main suspect when the Chamber opens in Hogwarts. This all leads to the inevitable confrontation with Tom Riddle's memory and the Basilisk lurking in the chamber. This is the book where he also obtains the Sword of Gryffindor, only for it to disappear and reemerge years later.
Arabella Stanton - Hermione Granger
Age while filming:
- Season 1 (started July 2025) - 11
- Season 2 (started August 2026) - 12
Like Dominic McLaughlin, Arabella Stanton was cast as Hermione at age 11. Stanton, born on April 11, 2014, turned 12 in April of this year, meaning she was mostly 11 during the bulk of filming for Harry Potter and the Philosopher's Stone.
With Season 2 just starting filming in August 2026, Stanton will be the same age as her book counterpart during the novels' Chambers of Secrets timeline.
Emma Watson, the original Harry Potter film's Hermione, was the youngest of the original trio and still looked like a first-year through most of the second film. Watson, born on April 15, 1990, was 11 at the start of filming for the Chamber of Secrets movie in November 2001. She turned 12 a few months before production wrapped in July 2002.
Hermione has a rather important role in Chamber of Secrets, despite being sidelined in the final battle due to being petrified by the Basilisk. She pieces together the mystery of the chamber, identifies the basilisk from the pipes, brews the Polyjuice Potion to transform Harry and Ron into Malfoy's cronies to find out if Draco is the Heir of Slytherin, and navigates Mudblood slurs from Malfoy.
Alastair Stout - Ron Weasley
Age while filming:
- Season 1 (started July 2025) - 11
- Season 2 (started August 2026) - 12
Unlike his Harry Potter co-stars, Alastair Stout's birthday has yet to be released online, but it's reasonable to assume he is the same age as McLaughlin and Stanton, as this aligns with the goal of HBO's casting strategy. This means that Stout's age will be roughly the same as Stanton's and McLaughlin's during Season 2 filming, placing him at 12 years old.
In comparison, Rupert Grint, the Harry Potter movies' Ron Weasley, was the oldest of the original trio by a clear margin. Grint, born on August 24, 1988, was two years older than Emma Watson and a year older than Daniel Radcliffe. This means he was already 13 years old before filming for Chamber of Secrets began in November 2001, and he turned 14 a month after production wrapped in July 2002.
Harry Potter and the Chamber of Secrets gives Ron some of the book's major moments. Ron drives the Weasleys' Ford Anglia to save Harry from the Dursleys. His wand is broken throughout the second year, leading to both hilarious and concerning moments, and he confronts his fear of spiders when he faced Aragog. There is also some commentary on Ron's insecurity about being the sixth brother and the poor kid at Hogwarts.
