Mary Margaret O'Hara was born in Toronto, Ontario, Canada. She is known for Splice (2009), Museum Hours (2012) and Maudie (2016).

Make your IMDb page stand out by adding a demo reel

Get a closer look at some of Hollywood's perfect pairs.

Hollywood Power Couples

Get a closer look at some of Hollywood&#39;s perfect pairs.

"The Gentlemen" and "Slow Horses" return this fall, while the "Reacher" spin-off series "Neagley" makes its debut. See our guide of the biggest Fall TV and streaming releases.

2026 Fall TV and Streaming Watch Guide

&quot;The Gentlemen&quot; and &quot;Slow Horses&quot; return this fall, while the &quot;Reacher&quot; spin-off series &quot;Neagley&quot; makes its debut. See our guide of the biggest Fall TV and streaming releases.

Get a closer look at these actors from their many TV and streaming series roles.

Streaming Stars, Then and Now

Ethan Hawke and Sally Hawkins in Maudie (2016)

Mary Margaret O'Hara

Known for

Credits

Actress

Composer

Music Department

Videos1

Personal details

Did you know

Contribute to this page

More to explore

Recently viewed