

Her film projects that year included Big Stan and The Murder of Princess Diana, a television film based on the book of the same name by Noel Botham. In 2007, Morrison appeared as Kirce James in the computer game Command & Conquer 3: Tiberium Wars, a character who frequently interacts with the player during the course of the GDI campaign. Morrison did not stay involved creatively, but is credited as an associate producer on the first season for her involvement in finding it and helping it get into the right hands. She is also one of the producers who found Glee during its early draft and brought it to attention of writer Ryan Murphy, who adapted it into a television series. In 2006, Morrison starred in and produced the independent film Flourish. Morrison returned for the series finale " Everybody Dies" in 2012.

Morrison's character left in the 2009 episode " Teamwork", but returned in the 2010 episode " Lockdown" to conclude Cameron's story.

She played the role for the first six seasons of the show, from 2004 to 2009. In 2004, Morrison won the role of immunologist Dr. Morrison's first leading role came in the 2000 film Urban Legends: Final Cut, and she has since gone on to appear in films including Grind (2003), Surviving Christmas (2004), and Mr. Morrison made her feature film debut at the age of 14 in the 1994 film Intersection, and later appeared as Samantha in Stir of Echoes (1999). She was featured on the cover of Sports Illustrated for Kids with basketball star Michael Jordan in May 1992. Morrison started her career as a child model, appearing in print advertisements for JCPenney and Montgomery Ward, and commercials for Rice Krispies and Mondo. Morrison at the Fox Broadcasting Company upfronts in 2008 She studied at the Steppenwolf Theatre Company before moving to Los Angeles to pursue a career in acting. She attended Loyola University Chicago, where she majored in Theatre and minored in English, graduating in 2000. She was an All-State clarinet player in the school's marching band, sang in the choir, and was a cheerleader in the school pep squad.

Morrison attended South Middle School, and then graduated from Prospect High School (where her parents worked) in 1997. Her father, David, is a retired music teacher and high school band director who was named Teacher of the Year by the Illinois State Board of Education in 2003. She is the oldest of three children her sister, Julia, is a singer-songwriter and music band therapist, and her brother, Daniel, is a high school band director. Morrison was born in Chicago, Illinois, and grew up in Arlington Heights, Illinois.
