United Kingdom, March 20 -- Cillian Murphy starts to think about bedtime at 5.30pm because he loves an early night.

The Peaky Blinders: The Immortal Man star has opened up about his love of sleep and admitted he starts fantasising about turning in at least four hours before he's due to retire.

During an appearance on the SmartLess podcast, he explained: "I do start thinking about bed from, yeah, about half past five. Yeah, that is, that is true ... I mean, I'm just thinking about it. Yeah, yeah, you know, but I will be approaching ... I'll be in bed by like half nine, right?"

The Oppenheimer star went on to reveal his love of sleep gets turned upside down whenever he takes on a theatre role because he has to work in the evenings - and ...