Several good ones already, especially Anne Hathaway, Bobbie Phillips, Beth Riesgraf, Monica Bellucci, Evangeline Lilly, and the Jessicas (Alba and Biel, not so much Simpson), to which I'd add:
Hudson Leick
Amanda Tapping
Georgina Rylance
Kaley Cuoco
Christa Miller
Amy Jo Johnson
Piper Perabo
Sarah Carter
Maggie Lawson
Carly Pope
Kristen Miller
Famke Janssen
Kiele Sanchez
Emma Caulfield
Yvonne Strahovski
and
Amy Acker
to name just a few.