The `We Bought a Zoo` actress` divorce from Ryan Reynolds was finalised in July but she insists it would be a "waste of time" to lament their two-year-union as she has had such a "charmed" life until her relationship woes. She told US TV show `Extra`: "I don`t believe in having any regrets. It`s a waste of time to regret anything. I own all of my decisions, and I`ve led a very charmed life up until this point." Despite having no regrets, the 27-year-old beauty admits she has had a "challenging" 12 months. She told `Access Hollywood`: "I`ve had ups and downs. Certainly, this past year has had a lot of unexpected things in many beautiful ways, many challenging ways." When asked if she think she`ll ever walk down the aisle again, Scarlett joked she thinks she would have to go undergo therapy to find out. She said: "That`s a deep question that I think probably requires a cheque for $250, and a couch - lying down." Despite their marriage failing, Scarlett has admitted her union with Ryan was the "best thing" she ever did. She previously said: "It was the best thing I ever did. 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."