Maggie Siff is an American actress who built a career playing complicated, intelligent women on prestige television. She is best known for her leading role as Wendy Rhoades on the Showtime drama Billions, a performance that ran for seven seasons. Before that, she captured audiences as the doomed Rachel Menken Katz on Mad Men and as Dr. Tara Knowles on the FX biker drama Sons of Anarchy.
Born in New York City in 1974, Siff has demonstrated remarkable range across stage and screen. While she is a familiar face to millions of viewers, she has remained notably private about her personal life, particularly regarding her late husband and daughter. Her work continues to draw interest, and she recently made her West End debut in London.
This article covers her age, background, family, career highlights, financial status, and what she is doing now, based on verified public records and reliable sources.
Who is Maggie Siff? Biography & Background
Key Insights at a Glance
- Maggie Siff is best known for playing two iconic TV characters: Wendy Rhoades in Billions and Rachel Menken Katz in Mad Men.
- She was married to Paul Ratliff, a psychologist and mental health practitioner, who died of brain cancer in 2021.
- Her net worth is estimated at $8 million, primarily driven by her television work.
- Siff graduated from the prestigious Bronx High School of Science and earned a B.A. in English from Bryn Mawr College.
- She is also a singer and has appeared in several independent films.
- She made her West End theatre debut in 2026 at the age of 51.
Snapshot Biography
| Detail | Information |
|---|---|
| Full Name | Maggie Siff |
| Date of Birth | June 21, 1974 |
| Age (2025) | 51 years old |
| Place of Birth | Bronx, New York, USA |
| Education | Bryn Mawr College (B.A. in English, 1996) |
| Occupation | Actress, Singer |
| Years Active | 2002–present |
| Spouse | Paul Ratliff (m. 2012; died 2021) |
| Children | 1 daughter (Lucy, b. late 2013 / 2014) |
| Net Worth | ~$8 million (estimated) |
What is Maggie Siff Most Famous For? Career Highlights
Siff’s career is defined by three major television roles that demonstrate her ability to portray strong, complex women. Her first major breakout came with the critically acclaimed AMC drama Mad Men.
Mad Men (2007–2008)
Siff played Rachel Menken Katz, the savvy department store heiress who becomes a love interest for Don Draper. Though her role spanned only the first season, it was a breakout performance that established her as a formidable dramatic actress.
Sons of Anarchy (2008–2014)
She then took on the role of Dr. Tara Knowles, the love interest and later wife of protagonist Jax Teller on the FX series Sons of Anarchy. Her portrayal earned her two TV Guide Award nominations for Best Supporting Actress, and she remained a core cast member for six seasons.
Billions (2016–2023)
Siff’s most prominent role is Dr. Wendy Rhoades, the in-house performance coach at the hedge fund Axe Capital, on Showtime’s Billions. She starred opposite Paul Giamatti and Damian Lewis for seven seasons. Reports indicate she earned approximately $1.39 million per year for her work on the series.
Film Work & Other Roles
Beyond television, Siff has appeared in several films. Her notable movie credits include Push (2009) and Leaves of Grass (2010). In 2016, she starred in the independent drama A Woman, a Part, for which she also served as an executive producer. She has also worked as a television spokesperson for the robo-advisor service Betterment. Additionally, she is a trained singer.
In 2026, at the age of 51, Siff made her West End debut in London, marking a significant new chapter in her live performance career.
Who is Maggie Siff’s Husband? Marriage & Family
Maggie Siff was married to Paul Ratliff, a psychologist and mental health practitioner. The couple married in October 2012. They have one daughter together, Lucy, who was born in late 2013, though some sources cite 2014. Siff has been exceptionally private about her family life, rarely discussing her husband or daughter in public interviews.
Tragically, Paul Ratliff died in 2021 after a battle with brain cancer. Siff has not publicly commented extensively on her personal loss, choosing to grieve away from the public eye. Following his death, she has continued her acting career, balancing her work with raising her daughter.
What is Maggie Siff’s Net Worth? (2025 Estimate)
Maggie Siff’s net worth is estimated to be around $8 million. This wealth has been primarily accumulated through her long-running television roles. Her salary on Billions was reported to be approximately $1.39 million per year.
Earlier estimates from mid-2023 placed her net worth as low as $2 million, but more recent consensus among multiple sources updates that figure to $8 million. This increase is attributed to the completion of her seven-season run on Billions and accumulated residuals from Mad Men and Sons of Anarchy.
Net worth figures for private individuals are estimates based on available public data, such as reported salaries and property. Exact figures are not publicly disclosed and should be treated as approximations.
What is Maggie Siff Doing Now? Recent & Upcoming Projects
Following the conclusion of Billions in 2023, Siff has remained active in the entertainment industry. Her most notable recent professional activity was her West End debut in London, which took place in 2026.
As of 2025, she continues to act selectively. While no major new television series or blockbuster film projects have been formally announced, her schedule remains active in independent film and potential streaming projects. Fans interested in her upcoming work should follow official announcements via her agency or verified social media profiles.
Career and Life Timeline of Maggie Siff
- 1974: Born on June 21 in the Bronx, New York.
- 1996: Graduates from Bryn Mawr College with a B.A. in English.
- 2004: Makes first television appearance on Rescue Me.
- 2007: Cast as Rachel Menken on Mad Men (2007–2008).
- 2008: Joins Sons of Anarchy as Dr. Tara Knowles (2008–2014).
- 2012: Marries psychologist Paul Ratliff in October.
- 2013/2014: Welcomes daughter Lucy.
- 2016: Begins role as Dr. Wendy Rhoades on Billions (2016–2023).
- 2021: Husband Paul Ratliff dies of brain cancer.
- 2026: Makes West End theatre debut in London at age 51.
What is Confirmed and What Remains Unclear About Maggie Siff?
| Established Information | Information That Remains Unclear |
|---|---|
| Date of birth: June 21, 1974. | Exact net worth is not publicly disclosed; estimates vary. |
| Married to Paul Ratliff (psychologist). | Exact wedding date is not publicly known. |
| Has one daughter (born late 2013 / 2014). | Specific details of her current (2025) salary or contract terms. |
| Starred in Billions, Mad Men, Sons of Anarchy. | Any dating history or relationships outside her marriage. |
| Net worth is widely reported around $8 million. | Specific details of her future acting projects. |
What is Maggie Siff’s Career and Public Persona Based On?
Maggie Siff built a reputation playing complex, intelligent women in high-drama television. She transitioned from a supporting role on Mad Men to a co-lead on Billions, demonstrating remarkable longevity in a competitive industry. Her decision to maintain strong privacy boundaries regarding her family, especially after the death of her husband, has made her a respected figure in an era of pervasive social media oversharing. Her work as both an actress and a producer, as well as her transition to the stage, reflects a career defined by thoughtful choices.
What Do Credible Sources Say About Maggie Siff?
“Maggie Siff is an actress known for her depth and intelligence in roles from Mad Men to Billions.”
— The Actors Center
“Maggie Siff established herself as an actress capable of performances suffused with intelligence, strength, and deep reserves of world-weary charisma.”
— Rotten Tomatoes
Maggie Siff: A Summary of Her Life and Legacy
Maggie Siff has established herself as one of the most compelling dramatic actresses of her generation. From her early role on Mad Men to her defining performance on Billions, she has consistently chosen roles that depict strong, multifaceted women. Her private life, marked by personal tragedy and a fierce commitment to family, stands in stark contrast to her public persona. For those interested in actresses with similar career trajectories, you might also enjoy reading about Morena Baccarin or Caitriona Balfe.
Frequently Asked Questions About Maggie Siff
How tall is Maggie Siff?
Maggie Siff is approximately 5 feet 8 inches (1.73 m) tall.
Does Maggie Siff have a degree?
Yes, she has a BA in English from Bryn Mawr College (1996).
Is Maggie Siff married?
She was married to psychologist Paul Ratliff from 2012 until his death in 2021.
How many children does Maggie Siff have?
She has one daughter, Lucy, born in late 2013 or 2014.
What is Maggie Siff’s most famous role?
She is most famous for playing Dr. Wendy Rhoades in the Showtime series Billions.
Did Maggie Siff leave Billions?
The series concluded in 2023, ending her run as a main character.
What is Maggie Siff’s net worth?
Her net worth is estimated to be approximately $8 million.
Where did Maggie Siff go to high school?
She graduated from the Bronx High School of Science.
Is Maggie Siff a singer?
Yes, in addition to acting, she is also a singer.
Has Maggie Siff performed on stage?
Yes, she made her West End debut in London in 2026.
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Kieran Doherty covers Westminster, councils, public policy and political affairs across the United Kingdom.