United Kingdom, Sept. 12 -- Shanna Moakler regrets participating in Travis Barker's documentary.

The 51-year-old actress was married to Travis between 2004 and 2008, but she now regrets agreeing to appear in Travis Barker: Louder Than Fear, the musician's new documentary.

Shanna told the I Do, Part 2 podcast: "I regret a lot. I wish I didn't do it.

"I don't know how he got me to go and do this documentary. I think it was before he was with his wife [Kourtney Kardashian]. I'm pretty sure. And I just wish I hadn't done it because I knew in my heart I wasn't going to be portrayed the way that I felt I deserved."

Shanna admitted to being "disappointed" in herself for appearing in the documentary.

The actress - who has Landon, 22, and dau...