Maggie Siff is an American actress best known for playing Rachel Menken Katz on Mad Men, Dr. Tara Knowles on Sons of Anarchy, and Wendy Rhoades on Billions. Her work sits at the intersection of independent film, stage drama, and prestige cable television.
Born in The Bronx, New York City, on June 21, 1974, she is 52 years old as of 2026. She studied English at Bryn Mawr College and later completed an M.F.A. in acting at NYU’s Tisch School of the Arts.
On screen, she is associated with three major television series: Mad Men, Sons of Anarchy, and Billions. Off screen, she has kept her private life guarded, and published details about her family and finances remain limited.
How old is Maggie Siff?
Maggie Siff was born on June 21, 1974, which makes her 52 years old as of 2026. Her birthplace is The Bronx, New York City.
June 21, 1974
The Bronx, New York City
Mad Men, Sons of Anarchy, Billions
Paul Ratliff (m. 2012)
Her education is also well documented. She attended The Bronx High School of Science, graduated from Bryn Mawr College in 1996 with a degree in English, and earned an M.F.A. in acting from NYU’s Tisch School of the Arts.
Key insights
- Maggie Siff is an American actress who rose to prominence with her role as Rachel Menken Katz on Mad Men.
- She later played Dr. Wendy Rhoades on Showtime’s Billions, a role that ran for seven seasons.
- Siff has kept her personal life relatively private; she was married to Paul Ratliff and had one daughter, Lucy.
- Educated at Bryn Mawr College and NYU’s Tisch School of the Arts, she came to acting with formal theater training.
- Her net worth is not officially documented, and published estimates are inconsistent.
- Theater work, including off-Broadway productions, preceded her television breakout.
- Her film credits include Push, Leaves of Grass, and A Woman, a Part.
Key facts at a glance
| Fact | Detail |
|---|---|
| Full name | Margaret Siff |
| Born | June 21, 1974 |
| Age | 52 (as of 2026) |
| Birthplace | The Bronx, New York City |
| Nationality | American |
| Occupation | Actress |
| Education | The Bronx High School of Science; Bryn Mawr College (English, 1996); M.F.A. in acting, NYU Tisch School of the Arts |
| Spouse | Paul Ratliff (m. 2012; died 2021) |
| Children | One daughter, Lucy |
| Notable TV roles | Rachel Menken Katz (Mad Men), Dr. Tara Knowles (Sons of Anarchy), Wendy Rhoades (Billions) |
| Notable films | Push (2009), Leaves of Grass (2010), A Woman, a Part (2016) |
| Net worth | Not officially confirmed; one biographical site lists $8 million |
Who is Maggie Siff’s husband?
Maggie Siff married Paul Ratliff in 2012. Public sources confirm the marriage, and they also report that Ratliff died in 2021 from brain cancer.
Is Maggie Siff married?
Siff was married in 2012. Since her husband’s death in 2021, no later marriage has been reported in the available sources.
Does Maggie Siff have children?
Yes. Siff and Paul Ratliff had one daughter, Lucy.
Who is Maggie Siff’s new partner?
No recent public updates confirm a new partner. The available sources contain no reports of Siff being in a new relationship after Paul Ratliff’s death.
Siff has maintained a low-profile personal life throughout her career. Most available details about her marriage, her husband’s death, and her daughter come from public records and biographical databases rather than from personal disclosure.
What is Maggie Siff’s net worth?
Maggie Siff’s net worth is not a matter of public record. Figures that circulate online come from celebrity biography websites, and they are not consistent.
One biographical website lists her net worth at $8 million. That figure, however, is not confirmed by a major trade publication or by Siff herself.
Published assessments generally attribute her earnings to television work, especially her long-running roles on Sons of Anarchy and Billions.
The $8 million figure published by one biographical site has not been corroborated by a major trade publication or an official source. Because no verified financial disclosure exists, every net worth number attached to Maggie Siff should be read as an estimate.
What movies and TV shows has Maggie Siff starred in?
Siff’s screen career includes a wide range of television series and several films. Her television résumé, as compiled by the Television Academy, includes nip/tuck, Grey’s Anatomy, Law & Order, Life on Mars, and Dollhouse alongside her best-known shows. The Actors Center has also documented a career that spans stage, television, and film.
What is Maggie Siff’s role in Billions?
On Billions, Siff played Dr. Wendy Rhoades, the in-house performance coach at Axe Capital. Her character is central to the show’s interpersonal dynamics, and the role ran for seven seasons from 2016 to 2023.
She discussed the character in a 2016 interview with The New York Times around the time of the series premiere.
What was Maggie Siff’s role in Mad Men?
On Mad Men, Siff played Rachel Menken Katz, a department store heiress, during the show’s first two seasons. The role gave her early exposure to a national audience and remains one of her most recognized parts. A dedicated page covers the Mad Men cast and characters.
Between her Mad Men and Billions years, Siff also played Dr. Tara Knowles on Sons of Anarchy.
What films has Maggie Siff appeared in?
Her film credits include Push (2009), Leaves of Grass (2010), and A Woman, a Part (2016).
Siff did not enter television as a newcomer. She holds an M.F.A. in acting from NYU’s Tisch School of the Arts and built a theater résumé, including off-Broadway work, before landing her best-known television roles.
How did Maggie Siff’s career develop over time?
These milestones trace Siff’s path from a Bronx upbringing to years of steady work in television drama.
- : Born in The Bronx, New York City, on June 21.
- : Graduated from Bryn Mawr College with a degree in English.
- –: Played Rachel Menken Katz on AMC’s Mad Men during its first two seasons.
- : Appeared in the film Push.
- : Appeared in the film Leaves of Grass.
- : Married Paul Ratliff.
- : Her daughter, Lucy, was born.
- : Began starring as Dr. Wendy Rhoades on Showtime’s Billions and appeared in the film A Woman, a Part.
- : Paul Ratliff died of brain cancer.
- : Billions concluded after seven seasons.
What is confirmed about Maggie Siff’s life and career?
Several facts about Siff are confirmed across multiple sources. Other details, especially those involving money and personal life, have never been clarified.
| Established | Remains unclear |
|---|---|
| Born June 21, 1974, in The Bronx, New York City | Exact net worth, which no official source has confirmed |
| Education: Bryn Mawr College and NYU’s Tisch School of the Arts | Relationship status after Paul Ratliff’s death in 2021 |
| Marriage to Paul Ratliff in 2012; one daughter, Lucy | Whether she runs any verified social media accounts |
| Major roles: Mad Men, Sons of Anarchy, Billions | Future projects, which have not been announced |
What makes Maggie Siff’s career significant?
Siff’s career illustrates a transition from stage to prestige television. Her early role on Mad Men established her as a compelling dramatic actress. The role of Wendy Rhoades on Billions, a high-stakes finance drama, showcased her ability to hold the screen alongside strong male leads.
Her decision to keep her personal life out of the spotlight has reinforced her standing as a serious artist. She is often grouped with other Mad Men alumnae who built long-term television careers. The series itself is covered in the Billions series overview.
What have critics and sources said about Maggie Siff?
Published profiles of Siff consistently emphasize the range of her television work and the poise she brings to dramatic roles.
“Siff projected an image of cultured sophistication that set her apart from other actresses of her generation.”
“Maggie Siff is an American actress. Her most notable television roles have included department store heiress Rachel Menken Katz on the AMC drama Mad Men…”
— Wikipedia
What should you remember about Maggie Siff?
Maggie Siff has built a durable television career across Mad Men, Sons of Anarchy, and Billions while keeping her personal life out of the public eye. Born in The Bronx in 1974 and trained at Bryn Mawr College and NYU’s Tisch School of the Arts, she has let her acting define her public profile. Her exact net worth remains unconfirmed, and her next project has not been announced, but her reputation as a serious dramatic actress is well established.
What else do people ask about Maggie Siff?
Does Maggie Siff have an Instagram?
No verified Instagram account has been confirmed in the available sources. Her social media presence therefore remains unconfirmed.
What is Maggie Siff’s educational background?
She attended The Bronx High School of Science, graduated from Bryn Mawr College in 1996 with a degree in English, and earned an M.F.A. in acting from NYU’s Tisch School of the Arts.
Where is Maggie Siff from?
She was born in The Bronx, New York City, on June 21, 1974. She is American.
Is Maggie Siff on Twitter?
No verified Twitter account has been publicly identified.
How tall is Maggie Siff?
Various entertainment databases list her height at approximately 5 feet 6 inches (1.68 m), though no official confirmation exists.
How many seasons of Billions did Maggie Siff appear in?
She starred in Billions from 2016 to 2023, appearing across the show’s seven seasons.
Amelia Grant is Local Government Editor at RegionalReport.co.uk, covering council decisions, regional public policy, combined authorities, planning, housing and transport.