Tricia Helfer
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Tricia Janine Helfer (born April 11, 1974) is a Canadian model and actress. She is best known for playing the humanoid Cylon Number Six in Ronald D. Moore's re-imagined Battlestar Galactica television series (2004–2009) and for voicing Sarah Kerrigan, the Queen of Blades, in the Starcraft 2 trilogy.

Helfer was born in rural Donalda, Alberta, to Dennis and Elaine Helfer. She studied at William E. Hay Composite High School in Stettler, Alberta. She lived and worked on the family's grain farm with her three sisters—Trina, Tammy, and Tara. She was discovered at age 17 by a modeling agency scout while standing in line at a local movie theatre. She is of German, English, Swedish, and Norwegian descent.

In 1992 she won Ford Models' Supermodel of the World contest. Helfer retired from fashion modelling in 2002 and claimed all her shoots since then are related to projects or product endorsements. She has appeared in ad campaigns for Ralph Lauren, Versace, Chanel, and Giorgio Armani.