Peaky Blinders' Cillian Murphy reveals big career advice for actor son Aran Cillian Murphy's youngest son, Aran, is following in his dad's acting footsteps, and Cillian has given him a big piece of advice. 13 March 2026 Cillian Murphy says actors need to remember they are one small part of a much bigger team. Actor Cillian Murphy The 49-year-old actor stressed the importance of staying humble and respectful in showbiz to his 18-year-old son Aran, who is following in his dad's footsteps.