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OTRC: Jennie Garth talks divorce, new book, '90210' on 'GMA' - watch

Jennie Garth appears on 'Good Morning America' on March 5, 2014 to promote her new memoir 'Deep Thoughts From a Hollywood Blonde.' (ABC / Heidi Gutman)

Jennie Garth stopped by ABC's "Good Morning America" to promote her new memoir, "Deep Thoughts From a Hollywood Blonde," where the actress spoke about her divorce from ex-husband Peter Facinelli and her days on the hit TV series "Beverly Hills, 90210."

Garth, 41, spoke candidly with "GMA" host Lara Spencer about her split from Facinelli, 40, in 2012 and the death of her father in 2008. The actress says the two events were challenging, but ultimately when writing the book, helped shape her into the person she is today. Video of Garth's interview can be viewed below.

"In some ways [it was] cathartic, and very eye-opening for myself in a good way to sort of take a look and see how my life has progressed and all the things that have sort of happened and how they have molded me into the person that I am today," Garth said about deciding to write about her personal life.

Garth also spoke about her time on the hit FOX teen soap opera "Beverly Hills, 90210," where she portrayed Kelly Taylor on the series for 10 seasons from 1990 to 2000. Despite working, what she says, were grueling 16 to 18 hour days filming the show, it is something she will cherish forever.

"We spent 10 years in a cave, basically and that was our high school and our college," Garth said. "We had a great time, I mean, what an experience, I wouldn't have traded it for the world. But, in some ways I missed out on a lot of things but in a lot of ways I was very lucky. So, how do you compare the two?"

The mom of three also spoke her continued relationships with her former "90210" co-stars Luke Perry and Tori Spelling, who portrayed Dylan McKay and Donna Martin, respectively. Garth, who is working with Spelling on a new television series, says that despite fans hoping for a real-life romance between her and Perry, the two are more like brother and sister.

"It's just Kelly and Dylan. I don't know, people just have this image in their mind of what, I don't know," Garth said."Our fans are so loyal from that show and we're so grateful for that. What a great fan base, and they've gone with us to all of our other jobs, all of us, so it's so nice."

"We [Spelling and Garth] are doing a show for ABC Family, "Mystery Girls," and she and I are so thrilled to be working together," Garth continued. "We're executive producing it and we're just having the best time off camera and on camera and we can't wait to get started in April."

Watch Jennie Garth's full "Good Morning America" interview below.

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