Glau was classically trained as a ballerina and also studied tango and flamenco. A professional dancer since age 12, she appeared in several television commercials.

Having relocated to Los Angeles in 2002, Glau's first television credit was a guest role as a ballerina on the 2002 episode "Waiting in the Wings" (episode 3x13) of the television series Angel. There she caught the eye of director Read more...

She is of Scots-Irish and German descent. Glau revealed in April 2007 that she is in a relationship with American actor Daniel Wisler.

Summer Glau (born July 24, 1981 in San Antonio, Texas) is an American dancer and actress, best known for her role as River Tam in the short-lived science fiction series Firefly and follow-up movie Serenity as well as Tess in The 4400. She now appears on the Fox network TV series Terminator: The Sarah Connor Chronicles as Cameron Phillips.