United Kingdom, March 13 -- Cillian Murphy says actors need to remember they are one small part of a much bigger team.

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.

Cillian told E! News: "I did a play when I was very young, and I think I was rushing out to get to the pub, and I just dropped my costume on the ground.

"And this older actor said, 'Always,alwayshang up your costume.'

"And what he meant by that was not just hang up, but like you're just the fella prancing around on stage there.

"There's a whole machine here, like technicians and stage management and front of house, and you're just the act. You're just one cog ...