The actor-and-musician has always been honest about his recreation marijuana use, but he is adamant he never uses the drug when he is shooting a film.
He said: "If it`s (marijuana) offered I`ll take it but I`m not a regular smoker, despite what people may think. I don`t smoke when I work because I want to have my wits about me. Besides sobriety is a wonderful high."
When is not working, Jeff - who has just released a self-titled album - likes to go to the cinema to relax but he admits he doesn`t enjoy as many films as he used to.
Revealing the last movie he watched at the cinema, he told Q magazine: "The new Woody Allen film, `Midnight In Paris`. My favourite is still `Crimes and Misdemeanours`, but that was excellent. I thought Owen Wilson was really good. I don`t tend to see too many movies these days; I`ve become a little too judgemental over the years! But when I see one I like, it`s still a great feeling."