Lennie James suffered night terrors after starring in 'The Walking Dead'

Asked if he learned anything about survival from being on 'The Walking Dead', Lennie told the Guardian newspaper: "One of the byproducts of being in the zombie world for as long as I was, was I started having very vivid and lucid dreams. I would quite often wake up shouting in the midst of a night terror, waking the house and making it difficult for my wife to sleep next to me.

"Someone suggested CBD oil, and it works. So I'd take that into a dystopia."

Lennie is a good friend of Jason Isaacs, star of 'The White Lotus', and the actor has admitted to being a huge fan of the TV series, too.

Lennie also insisted that he's "not as good" as his showbiz pal.

He said: "I hadn't seen the first two seasons - I'm not very good at watching obnoxious characters on screen - but one of my best mates, Jason Isaacs, is in the latest season. I started watching it, and it hooked me.

"Jas's performance was fantastic. We've known each other since just after drama school. I'm not as good as him, but I try."

The actor quit the UK for Los Angeles before he turned 40.

Asked why he decided to relocate to America, Lennie replied: "I had done at least one lead in a television show and a number of leads on stage. I was being told that I should be satisfied with that because that was a definition of success over here for someone who - as I took it - looked like me.

"I just wasn't willing to let somebody else decide what my ambition should be. I wanted to challenge myself as an actor, to see what was possible. I landed there when I was a relative grown-up and I seemed to arrive at the right time; it went stupidly well for me immediately."