"All that I know about is what friends and associates would send in texts and emails," she said.
"I know it sounds pretty unlikely that a person might be able to make herself, I guess, keep clear of those words or of that experience, but I have and it takes effort."
At the time, Zellweger told People magazine she was glad people noticed the change.
"I'm living a different, happy, more fulfilling life, and I'm thrilled perhaps it shows."
Zellweger's third Bridget Jones film, Bridget Jones's Baby, is in cinemas next September. The film includes the return of Colin Firth and welcomes former Grey's Anatomy actor Patrick Dempsey. AAP