Los Angeles: Hollywood actress Rachel McAdams says she tries to stay as close to boyfriend Michael Sheen as possible and the couple never spend more than three weeks apart.

Calling Sheen "a very funny person," the 33-year-old actress admitted it's hard being away from her actor beau when she's shooting a movie, reported US magazine.

"Michael and I never spend more than three weeks apart we rack up a lot of air miles but you have to be quite adaptable in this business whether you are in a relationship or not. Trying to establish roots somewhere is a bit of a joke," said McAdams.

Unlike her relationship with 'The Notebook's Ryan Gosling, McAdams said she waited until production wrapped on 'Midnight in Paris' before taking the next step with Sheen, 42.

"Michael and I didn't get together while we were filming Midnight in Paris, which I feel strongly about not doing when I'm working. We became quite good friends, which I think is a great way to start. I felt very blessed to have made a Woody Allen film in Paris together," she said.