Aran Murphy, Son of Cillian Murphy, Makes Acting Debut on HBO Series 'Youth'

Aran Murphy, the 19-year-old son of acclaimed actor Cillian Murphy, is stepping into the spotlight with a role in the upcoming HBO drama "Youth." The rising actor's casting and public appearance have generated considerable buzz, with many noting his strong resemblance to his father.

Murphy will portray Ruairi, a teenage character described as troubled and emotionally unraveling, who becomes entangled in social media trends. He shares the screen with Irish actress Sharon Horgan, Rupert Friend, and Robbie Gee. On Friday, Murphy attended a red carpet screening in London with his co-stars.

Images from the event quickly circulated on social media, prompting widespread comments on the young actor's likeness to Cillian Murphy. Online observers remarked on the similarity, with many stating he appears to be a "copy and paste" version of his father.

Despite his young age, Aran Murphy has been building a resume in film and television. Earlier in 2026, he was part of the cast for director Taika Waititi's science fiction adaptation "Klara and the Sun," starring alongside Jenna Ortega and Amy Adams. In the previous year, he joined the ensemble of "WAR," a co-production between HBO and Sky, which also featured Dominic West and Sienna Miller. His feature film debut occurred in 2022 with the independent sci-fi mystery "Lola."

Aran Murphy's family has had previous encounters with notable figures, including a meeting with Taylor Swift. During an episode of "The Graham Norton Show," Swift recalled meeting Aran and his older brother, Malachy, at an Oscars party. She later recognized Aran in the audience of the show, commenting on his resemblance to his father.

Cillian Murphy and his family relocated to Dublin, where they reportedly purchased a Victorian townhouse. The family had previously lived in London for 14 years, with both of Cillian Murphy's sons born there. The actor stated that the move back to Dublin in 2015 was partly motivated by a desire for his sons to have an Irish upbringing, noting that they had begun to develop "very posh English accents."