Edgley was born in Perth. She is the daughter of theatre, concert and circus promoter Michael Edgley, known for bringing the Moscow State Circus to Australia during the 1980s. Her mother, Jeni Edgley, was formally involved in managing a 250-acre health retreat. As a child, Gigi Edgley performed both in and out of school. She became mainly interested in acting and had her first professional theatrical engagement at the Twelfth Night Theatre. She earned a Bachelor of Arts degree from the Queensland University of Technology in 1998. As a believer in the school of method acting, Gigi has developed a broad set of skills and experiences for her roles. Edgley is proficient in martial arts along with ballet, jazz, character dance, and singing with her signature skill fire-twirling.

Edgley’s early TV and film work included several independent productions, as well as a guest star spot on the popular Australian series Water Rats and a role in Australian film titled The Day of the Roses. Edgley is best known for her role as Chiana on the science fiction TV series Farscape. Originally, she was hired for only one episode, and her character was supposed to die at the end of the hour. The creators decided to keep her around for a few more episodes. At the beginning of Season 2, she was promoted to be a regular on the show. She appeared in total of 68 episodes of the series. Her character’s nickname “Pip” was actually coined by her co-star Ben Browder.

Between Farscape seasons, Edgley has appeared in other guest starring roles on TV, including the series The Lost World and BeastMaster, has undertaken some independent film work, was cast in a feature film, and read a starring role in an audio drama for Seeing Ear Theatre. After the cancellation of Farscape, Edgley pursued other projects including a role in the Australian drama telefilm BlackJack with Colin Friels. She joined the cast of Australian drama series The Secret Life of Us in 2003 and Stingers in 2004.

Edgley returned as Chiana in the SciFi Channel miniseries Farscape: The Peacekeeper Wars in 2004. In 2006 Edgley starred as the female lead in critically acclaimed Australian Drama/Thriller Last Train to Freo. Her role was nominated for a Best Actress in a Lead Role by the Film Critics Circle of Australia. She also had a minor supporting role in the 2007 USA Network TV miniseries The Starter Wife. She had a leading role in three seasons of Rescue: Special Ops from 2009. In 2018, she appeared in the film Diminuendo opposite Richard Hatch. In 2014 she hosted Jim Henson’s Creature Shop Challenge as herself!

Edgley has won numerous awards as well including:

• 2006 – Film Critics Circle of Australia Award Nomination for Best Actress in a motion picture (Last Train to Freo)
• 2003 – SyFy Genre Award for Best Supporting Actress (Television)
• 2002 – Saturn Award Nomination for Best Supporting Actress in a Television Series (Farscape)
• 2001 – Maxim Award Nomination for Sexiest Space Babe (Television)