Who are Sarah Polley’s Siblings? A Look at Her Brothers and Sisters

Who are Sarah Polley’s siblings? A Look at Her Brothers and Sisters

Sarah Ellen Polley is a Canadian filmmaker, writer, political activist, and retired actress.

An image of Sarah Polley
Read this article to the end to learn who Sarah Polley’s siblings are. (Source: Getty Images)

She came into the public spotlight as a child actress for her role as Ramona Quimby in the television series Ramona, based on Beverly Cleary’s books.

The popular actress was born on January 8, 1979, in Toronto, Canada, making her 45 years old currently.

She was born to Diane Elizabeth MacMillan and Harry Gulkin.

She was married to David Wharnsby from 2003–2008, and David Sandomierski is the current spouse after they tied the knot in 2011.

In this article, we will look more at the lives of Sarah Polley’s siblings.

Sarah Polley’s siblings

Sarah Polley's siblings

Sarah Polley is blessed with four siblings.

The four siblings are John Buchan, Susy Buchan, Joanna Polley, and Mark Polley

John Buchan and Susy Buchan are her half-siblings from her mother’s first marriage to her stepfather, George Deans-Buchan

Mark Polley and Joanna Polley are her full siblings as a result of her mother’s second marriage to Michael Polley.

John Buchan

John is Sarah’s sibling from her mother’s first marriage to George Deans-Buchan.

He is a casting director and producer who has worked on many of Sarah’s films.

He is best known for his roles in Women Talking (2022), In the Shadow of the Moon (2019), and Priscilla (2023).

Susy Buchan

Susy is also a half-sibling from her mother’s first marriage.

She works as a professional photographer, and her work has been featured in many publications, such as The Globe and Mail, Chatelaine Magazine, and Flare Magazine.

She also appeared in Sarah’s documentary, “Stories We Tell.”

Joanna Polley

Joanna is the biological sister of Sarah Polley.

She is an actress whose work is evident in her roles in “The Virgin Suicides” and “Urban Legend.”

Most of her personal information is not available online, but her role in the acting industry cannot be ignored.

Mark Polley

Mark is also another sibling of Sarah as a result of her mother’s second marriage to Michael Polley.

He was an actor who starred in the Canadian television series A Gift to Last (1976–78), The Virgin Suicides (1999), and E.N.G. (1989)

He also worked as a production assistant on some of Sarah’s films.


The Polley siblings are more than just names linked to a famous figure.

They are individuals with their own stories, contributing to the rich continuity of the Polley legacy.

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