Keri Russell

Keri Russell, who stars as a new member of the IMF, began her career on the Mickey Mouse Club in 1991. (Yup, with Christina Aguilera, J.C. Chasez, Ryan Gosling, Britney Spears, and Justin Timberlake.) But her real breakout came in 1998 when she played shy, love struck Felicity on The WB's Felicity.

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