Early life

Siff was born in The Bronx, New York City. Her father is Jewish, and Siff identifies as "half Jewish". She is an alumna of The Bronx High School of Science and of Bryn Mawr College, where she majored in English and graduated in 1996. She later completed an M.F.A. in acting at New York University's Tisch School of the Arts Graduate Acting Program.

Siff worked extensively in regional theater before acting in television. She won a Barrymore Award for Excellence in Theater in 1998 for her work in Henrik Ibsen's Ghosts at Lantern Theater Company.

Career

Siff started appearing in television series in 2004. She appeared as an Alcoholics Anonymous speaker during an episode of Rescue Me in Season 2. She also had roles on Law & Order: Special Victims Unit, Grey's Anatomy, and Law & Order.

She played Rachel Menken Katz on the series Mad Men from 2007 to 2008, which earned her a nomination, along with the rest of the cast, for a Screen Actors Guild Award for Outstanding Performance by an Ensemble in a Drama Series. She also appeared in Nip/Tuck during that time, before being cast as Dr. Tara Knowles on Sons of Anarchy in 2008. In the closing scene of the Sons of Anarchy episode "John 8:32," Siff sang the song "Lullaby for a Soldier (Arms of the Angels)."

She has appeared in such films as Then She Found Me (2007) as Lily, Push as a psychic surgeon (called a Stitch) named Teresa Stowe, sent to help Nick (played by Chris Evans), Funny People (2009) as Rachel, Leaves of Grass (2010) as Rabbi Renannah Zimmerman, and Concussion (2013) as Sam Bennet. She appears in the 2016 Showtime series Billions.

Personal life

In October 2013, Siff announced that she was expecting her first child with her husband, Paul Ratliff, whom she married in 2012. Siff is very private about her husband's anonymity. Siff gave birth to a baby girl in April 2014, named Lucy.

Filmography

Film

Film

Year	Title	Role	Notes
2007	Michael Clayton	Attorney #1
2007	Then She Found Me	Lily
2009	Push	Teresa Stowe
2009	Leaves of Grass	Rabbi Renannah Zimmerman
2009	Funny People	Rachel
2013	Concussion	Sam Bennet
2016	The 5th Wave	Lisa Sullivan
2016	A Woman, a Part	Anna Baskin	Post-production
2016	The Sweet Life	Ava	Post-production

Television

Television

Year	Title	Role	Notes
2004	Third Watch	Cindy	Episode: "Obsession"
2005	Rescue Me	Young Woman at AA	Episode: "Twat"
2006	Law & Order: Special Victims Unit	Emily McCooper	Episode: "Gone"
2006	3 lbs.	Lisa Kutchem	Episode: "The God Spot"
2007	Grey's Anatomy	Ruthie Sales	Episode: "The Heart of the Matter"
2007.1 !2007-2015	Mad Men	Rachel Menken	9 episodes
2007.2 !2007-2008	Nip/Tuck	Rachel Ben Natan	3 episodes
2008	Law & Order	Attorney Mahaffey	Episode: "Executioner"
2008.1 !2008-2013	Sons of Anarchy	Tara Knowles	79 episodes
2009	Life on Mars	Maria Belanger	3 episodes
2011	A Gifted Man	Lily	Episode: "In Case of Letting Go"
2016-present	Billions	Wendy Rhoades	Main cast member

Awards and nominations

Awards

Year	Award	Category	Series	Result
2008	Screen Actors Guild Award	Outstanding Performance by an Ensemble in a Drama Series	Mad Men	Nominated
2012	Critics' Choice Television Award	Best Supporting Actress in a Drama Series	Sons of Anarchy	Nominated
2014	Critics' Choice Television Award	Best Supporting Actress in a Drama Series	Sons of Anarchy	Nominated

[ Source: Wikipedia ]