The Chicago star married Chesney in May 2005 after meeting him at a tsunami relief benefit concert in January of that year.
The marriage was annulled after just four months.
Zellweger admits she went into the marriage for the wrong reasons, saying, "I felt a fool. I think I was just looking for something else. I wanted to put acting aside and sit still for a while and not worry about the stresses and the travel and the interviews.
"I was going through a huge life change at the time. I just wanted to stop and take time out--my marriage came as part of that change but I did take it very seriously."
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