Simon Pegg has talked about how he would hide his alcohol abuse while on set.
The said that he became "sneaky" when he was working and would come up with ways to hide his alcoholism.
However, he said he got to a point where he couldn't hide it anymore which is when he took action.
Speaking on BBC Radio 4's Desert Island Discs Simon said: "You become very sneaky when you have something like that in your life.
"You learn how to do it without anyone noticing because it takes over. It wants to sustain itself and it will do everything it can to not be stopped.
"But eventually it just gets to a point when it can’t be hidden, and that’s when, thankfully, I was able to pull out the dive."
Pegg also discussed his childhood, early career as a comedian and struggles with depression, even while at the height of his Hollywood success in 2006.
Simon talked about the highs and lows of career and that he wants to continue working as long as he can.
He said he would "work till he dropped" and that he is "really happy when I’m working".
"Sometimes it’s difficult because it takes you away from home, and I do miss my family when I’m away," he said.
He added: "That’s something I’ve had to kind of learn how to cope with."
Simon went on to talk about his friendship with A-lister Tom Cruise.
He said he "makes fun" of the Hollywood star for being so famous, but is careful not to abuse the "privileged access" he has to him.
The British actor and comedian said the two shared an "easy relationship" that was "simple and amiable".
Simon said: "It’s always been a very easy relationship. I think you realise when you meet the person rather than the thicket of mythology that’s built up around them it’s a different experience.
"I mean, he loves (the fame) and he really relishes it, it’s all he knows. It energises him and spurs him on. I don’t think I would appreciate that particularly. I find that very stressful and overwhelming and I would maybe want to sort of retreat, I’m happy with where I am.
"We joke about it. I mean I always make fun of him for it, you know, about the things that he can access."
*If you're struggling and need to talk, the Samaritans operate a free helpline open 24/7 on 116 123. Alternatively, you can email jo@samaritans.org or visit their site to find your local branch
