After graduating from Simi Valley High School, Green appeared for several seasons as Libby Chessler in the television series Sabrina, the Teenage Witch beginning in 1996. She also performed in guest spots on television shows like ER and Dharma & Greg and participated in other Nickelodeon events such as The Big Help and the game show Figure It Out.
In 1999, Green was cast as Ivy in Bare: a pop opera. She performed in the original reading for the musical and the 2000-01 Los Angeles production. In 2002, she appeared in the TV movie First Shot. She also performed with the Pussycat Dolls when they were a feature burlesque show at The Roxy Theatre. In 2004, she moved to New York City where she again played Ivy in Bare during its brief off-Broadway run. In 2007, the cast album of Bare was released, featuring Green. Also in 2004, she performed in concerts and benefits with other cast members as well as on her own. She performed as Diana in a workshop of a new musical, Mask. In 2005, Green played Betty in the musical film Open House.
Green then became a cast member of the musical Wicked. She opened the role of Nessarose, on the First North American Tour, which opened March 2005. She also understudied the role Elphaba, and as a result, played the role over 40 times. She left the tour on March 5, 2006, and transferred to the Broadway production of the show, marking her Broadway debut. She reprised the role of Nessarose through December 31, 2006, before playing the role once again in the original Los Angeles production from February through December 2007.
On September 21, 2008, Green made her West End debut in "Never Neverland" a benefit concert that helped in aid of Ovarian cancer and NCH. The concert was at the Duchess Theatre in London. Alongside Green was fellow Wicked alumni Eden Espinosa and Scott Alan. On February 27, 2009 she guest starred on the CBS series Ghost Whisperer as Carrie in episode 4.16 "Ghost Busted".
In the fall of 2010 she appeared in the concert revue "For The Record: Quentin Tarantino" in Los Angeles, presented by ROCKLA for Show at Barre. It ran from August 12, 2010, to October 30, 2010. Also starring Tracie Thoms, Autumn Reeser, Ty Taylor, and Audra Mae.
She appeared at Show at Barre. It opened February 12, 2011, and closed June 30, 2011. Also starring were Tracie Thoms, Arielle Jacobs and Kate Reinders.
