Scarlett Johansson claims marrying Ryan Reynolds was the "best thing" she ever did.

The 27-year-old actress wed the Green Lantern star in 2008, and although they split in December 2010, Scarlett is not regretful as she felt it was "instinct" to set up a home with him.

"It was the best thing I ever did. I'm a big believer that when something feels right, you should do it. I'm a big believer in instinct. Getting married was the right thing to do because it was natural. It grew out of romance and love and a desire to have a future with somebody, and I was very fortunate that I married somebody who turned out to be the person I thought he would be."

However, the Avengers beauty admits the pair spent a lot of time away from one another and she was not prepared to do the work necessary to keep their romance alive. "Relationships are complicated. Being married is a living, breathing process. I think I was not fully aware of the peaks and the valleys. I wasn't prepared to hunker down and do the work. Both of us were extremely busy. We spent so much time apart. It's very difficult."