She later took a graduate level course in broadcast journalism through UCLA Extension, which was depicted on the first season of The Girls Next Door, most notably when she had to be absent from her first Playboy shoot in order to take her final exam.
On the advice of friends who suggested she pose for Playboy magazine, Marquardt sent a letter to Playboy, inquiring how to become a Playmate, before enrolling at San Joaquin Delta College.
She has appeared in several films, including the horror/comedy Kottentail in which she portrays a scientist doing genetic research on rabbits.
She appeared in an episode of Curb Your Enthusiasm as herself along with Madison and Hefner in 2005.
She appeared in The House Bunny with her fellow models and Hefner alongside Anna Faris.
Marquardt appeared in a 2002 episode of The Man Show as one of Hefner's playmates in the video game Playboy: The Mansion, which was released in January 2005, as well as in an episode of Celebrity Paranormal Project which aired on November 19, 2006.
star is still seeking the 82-year-old publisher’s blessing when it comes to dating. And we all went to dinner with my sister and her boyfriend.
Asked if Hefner approves of her new boyfriend – director Nick Carpenter, 29 – Marquardt, 35, told PEOPLE, “Yes he does! And then my real dad was at the mansion on the 4th of July, and Nick was actually there, but it was before we were dating.” So, with Marquardt blissfully happy and her new beau mingling easily with her family, is she interested in taking it to the next step?
Madison released a tell-all book about her experiences at the Playboy mansion earlier this year, and the stories in her memoir aren't sitting well with the "Kendra On Top" star.
She also appeared as herself along with Madison, Wilkinson and Hefner in the Entourage episode "Aquamansion".
The episode's final act took place at the Playboy Mansion.
After unsuccessfully testing twice for Playboy, she was invited to the Playboy Mansion and soon became a regular there.
In October 2002, after more than a year of visiting the Mansion, she was invited to move in and become one of Hefner's girlfriends. TV show The Girls Next Door, and has appeared with Holly Madison and Kendra Wilkinson in three cover pictorials in Playboy magazine, the November 2005, September 2006 and March 2008 issues.