Maggie Siff (born June 21, 1974) is an American actress. Her most notable television roles have included department store heiress Rachel Menken Katz on the AMC drama
Mad Men, Dr. Tara Knowles on the FX drama
Sons of Anarchy for which she was twice nominated for the Critics' Choice Television Award for Best Supporting Actress in a Drama Series, and psychiatrist Wendy Rhoades on the Showtime series
Billions. She has also had roles in the films
Push (2009) as Teresa Stowe, and
Leaves of Grass (2010) as Rabbi Renannah Zimmerman. She starred in indie film
A Woman, a Part (2016) and had a minor role in the drama film
One Percent More Humid (2017). She is the television spokesperson for the robo-advisor service Betterment.
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