Aran Murphy attends the London screening of HBO’s Youth.
Cillian Murphy’s 19-year-old son, Aran Murphy, is beginning to make a name for himself as an actor, and his recent appearance at the London screening of HBO’s Youth gave audiences a closer look at the rising performer.
Aran attended the special screening at BAFTA in London on Sept. 11, 2026, marking his first solo red carpet appearance connected to one of his own projects. While his resemblance to his famous father quickly became a talking point, the bigger story is that Aran is entering an increasingly busy period in his acting career.
The young actor stars in Youth as Ruari, the college-age son of Sharon Horgan’s character, Alex. The HBO comedy focuses on a divorced literary agent navigating relationships, family responsibilities and the challenges of entering her 50s while trying to understand the changing relationship she has with her son.
Aran Murphy Plays Ruari in HBO’s ‘Youth’
In Youth, Aran plays Ruari, Alex’s son, who is approaching adulthood at a particularly complicated point in his life.
Ruari is portrayed as a young man struggling with questions about identity, independence and what comes next after school. His relationship with his mother is an important part of the show’s family dynamic, particularly as Alex is also reassessing her own life.
The character is very different from the image of a polished celebrity child who might simply appear in a series because of his family background. Ruari is written as a complicated young person trying to figure out where he fits in.
That gave Aran an opportunity to take on a substantial character rather than simply making a brief guest appearance.
The role is also particularly relevant to Aran’s own stage of life. At 19, he is close in age to the character he plays and is himself moving from adolescence into a more independent period.
That overlap gave him some personal perspective when approaching the role, although Ruari’s personality and experiences are distinct from his own.
His Red Carpet Appearance Sparked Comparisons to Cillian Murphy
Aran’s appearance at the Youth screening attracted attention almost immediately because of his resemblance to his father.
Photos and videos from the London event showed the younger Murphy speaking with reporters and posing at the screening, prompting viewers to compare his facial features, expressions and mannerisms with those of Cillian Murphy.
The resemblance has been noticed before, but the recent appearance placed Aran in front of a much larger audience at a time when his own acting career is beginning to accelerate.
Cillian Murphy has spent much of his career keeping his private life away from the constant attention that often surrounds major Hollywood stars. Because of that, public appearances involving his sons have generally been relatively limited.
Aran has occasionally appeared with his family at major events, including the 2024 Academy Awards, but the Youth screening was different. This time, he was attending primarily because of his own work.
That distinction matters as Aran begins establishing himself independently as an actor.
‘Youth’ Is Aran’s First Major Television Role
Although Youth is an important milestone, it is not Aran Murphy’s first acting credit.
His screen career began with the 2022 film Lola, giving him an early opportunity to work professionally in front of the camera.
Since then, he has continued building his résumé with several high-profile projects.
He is also part of WAR, an HBO and Sky production featuring Sienna Miller and Dominic West. In addition, he has a role in Taika Waititi’s upcoming adaptation of Kazuo Ishiguro’s Klara and the Sun, which stars Jenna Ortega and Amy Adams.
The combination of these projects means Aran is moving into a particularly busy period early in his career.
However, Youth is arguably the project that has given audiences the clearest opportunity to see what he can do with a substantial television character.
The eight-episode HBO series puts him in a recurring role opposite Sharon Horgan, allowing him to develop a character across a full season rather than appearing briefly in a single episode.
Sharon Horgan Created a Character With Aran’s Generation in Mind
Youth comes from Sharon Horgan, who created and stars in the series after gaining recognition for shows including Catastrophe and Bad Sisters.
The series examines middle age from Alex’s perspective, but her relationship with Ruari provides an important connection to a younger generation.
Ruari is dealing with the uncertainty that can come with leaving school and trying to understand adulthood. At the same time, his mother is facing her own questions about relationships, career and what she wants from the next stage of her life.
That parallel gives the series two different perspectives on major life transitions.
Aran’s performance became particularly important because Ruari is not simply a background character. His problems and behavior help shape Alex’s story, while his relationship with his mother provides some of the show’s family tension.
The role required Aran to portray a young man who is often frustrated, uncertain and difficult to understand, making it a considerably more demanding opportunity than a brief supporting appearance.
Aran Has Already Worked With Major Names
The young actor’s upcoming projects suggest that his career is developing quickly.
In Klara and the Sun, Aran works alongside Jenna Ortega and Amy Adams in Waititi’s adaptation of the acclaimed Kazuo Ishiguro novel.
He is also part of WAR, another major television project with an established cast.
These opportunities give Aran exposure to different styles of production while allowing him to work with experienced actors and filmmakers.
For a performer at the beginning of his career, that kind of variety can be significant. Instead of becoming associated with just one type of role, Aran is already moving between television and film.
His work in Youth also shows that he is capable of taking on a character who is central to a show’s family storyline.
Being Cillian Murphy’s Son Brings Attention — and Expectations
There is an unavoidable level of interest surrounding Aran because of his father.
Cillian Murphy has become one of the most recognized Irish actors of his generation, with major roles in Peaky Blinders, Dunkirk, Oppenheimer and other prominent films.
His Oscar-winning performance in Oppenheimer further increased his international profile.
As a result, Aran’s decision to pursue acting naturally invites comparisons.
The physical resemblance makes those comparisons even more noticeable, but Aran is beginning his career at a time when audiences can evaluate his performances separately from his father’s work.
That may become increasingly important as more of his projects are released.
Aran’s early résumé already includes several different roles, giving him the opportunity to develop his own screen identity rather than being defined entirely by his family connection.
Cillian Murphy and Yvonne McGuinness Have Kept Their Family Life Private
Aran is the younger son of Cillian Murphy and artist Yvonne McGuinness. The couple also have an older son, Malachy.
The family has generally maintained a private lifestyle despite Cillian’s international fame.
Cillian has spoken in the past about wanting his children to have a grounded upbringing and to develop their own sense of identity away from the pressures of celebrity culture.
That approach helps explain why Aran has not been a constant presence on red carpets or entertainment programs.
His public appearances have largely been connected to specific occasions, such as the 2024 Oscars, when he attended alongside his parents and older brother.
The recent Youth event represented a different kind of appearance because Aran was there to promote a project in which he had a significant role.
Aran’s Career Is Expanding Beyond One Project
One of the most notable aspects of Aran’s current career is that Youth is only one part of a larger slate.
His work in Lola gave him an early introduction to film, while Youth provides a larger television platform. His upcoming appearances in WAR and Klara and the Sun give him additional opportunities to work across different genres and production environments.
That progression is important because it shows that his acting career is developing through multiple projects rather than being based on a single high-profile appearance.
At 19, he is still at the beginning of the process.
The attention surrounding his family will likely remain part of the public conversation, especially because of his resemblance to Cillian. But each new role gives Aran another opportunity to establish himself through his own performances.
‘Youth’ Gives Aran Murphy a Bigger Platform
The timing of Youth makes the series particularly significant for Aran.
The show premiered on HBO and HBO Max on Sept. 20, 2026, with eight episodes in its first season. It follows Alex as she navigates life after divorce, her complicated romantic situation and her responsibilities toward both her son and her aging parents.
Ruari sits at the center of the younger side of that story.
For Aran, playing the character means working within an ensemble led by Sharon Horgan while handling a storyline that deals with the uncertainties of young adulthood.
The role has already generated attention beyond the initial family connection, with entertainment coverage focusing on Aran’s performance and his growing list of projects.
That gives him a stronger foundation as he moves forward.
A New Generation of Murphy Steps Into Acting
Aran Murphy’s rise comes at an interesting point in his father’s career.
While Cillian Murphy continues to work on major film and television projects, his younger son is beginning to develop a career of his own.
The resemblance between them may continue to attract headlines, but Aran’s growing résumé gives audiences more to discuss than genetics.
From Lola to Youth, and with WAR and Klara and the Sun ahead, he is gradually gaining experience in different types of productions.
His recent London red carpet appearance offered a rare public glimpse of that transition. It also showed that Aran is becoming more comfortable stepping into the spotlight on his own terms.
For now, Youth represents his most visible television role and an important step in his early career. As his upcoming projects arrive, viewers will have more opportunities to see how he develops as an actor beyond the inevitable comparisons to his famous father.
