Holly Madison and her book were defended by her old friend, Bridget Marquard. According to a report from Inquisitr, the ex-Playmate also admitted that she is not friends with their former "Girls Next Door" co-star, Kendra Wilkinson.

Bridget Marquardt recently tweeted Holly Madison to congratulate her after guesting on Oprah Winfrey's "Where Are They Now?"

"That's awesome, Holly! Congrats!" Bridget Marquardt told the "Down the Rabbit Hole" author.

Holly Madison responded by thanking her former housemate. The 35-year-old also said that she was excited that they were going to see each other for Bridget Marquardt's birthday.

The "Bridget's Sexiest Beaches" host reportedly expressed her support for Holly Madison and her controversial book, which exposed several scandals that supposedly went on inside the Playboy mansion.

"I like Holly and I'm friends with her," Bridget Marquardt said.

"I'm happy for her that she wrote the book."

The 42-year-old was also frank when asked if she and Kendra Wilkinson are still friends.

"I haven't seen or talked to her in years," Bridget Marquardt said about the "Kendra on Top" star.

"It is crazy. We haven't had a falling out or anything. We just haven't talked."

According to a report from People, Kendra Wilkinson blasted Holly Madison and her book in an episode of "Kendra on Top."

The 30-year-old reality star has been vocal about her disgust over "Down the Rabbit Hole," which detailed the alleged manipulative behavior of pornography mogul Hugh Hefner. The memoir also exposed alleged drug use, lewd acts and bullying that took place inside the Playboy mansion.

"What Holly is saying is extremely false," Kendra Wilkinson said in her show's latest episode.

"I'm like, 'Where did this s--- come from?' She's living as a fake cartoon, I think. She's not living on Earth with us."

"That's how it felt, all those years living there. She really played this role. This fantasy type of role."

Now a wife to former NFL player Hank Baskett and mother to two children, Kendra Wilkinson defended Hugh Hefner and said that the 89-year-old magazine founder is too nice to call out Holly Madison's lies.

"Someone needs to have a voice against this," she said. "Hef won't do it. He's too nice of a guy."

"It's just weird how someone can get away with such a thing," Kendra Wilkinson added.