Summer Glau

Summer Lyn Glau (born July 24, 1981) is an American actress and dancer, known for playing River Tam in the science fiction series Firefly and follow-up movie Serenity, and for playing Cameron in the series Terminator: The Sarah Connor Chronicles.
Early life
Glau was born in San Antonio, Texas, where she grew up with her two younger sisters. She is of Scots-Irish and German descent. Her mother is a schoolteacher and her father a general contractor.