Lucy Boynton (born January 17, 1994) is a British actress. Her first professional role was as the young Beatrix Potter in Miss Potter (2006), for which she was nominated for the Young Artist Award for Best Performance in a Feature Film – Supporting Young Actress. She went on to play Posy Fossil in 2007 in the BBC film Ballet Shoes. She also played the role of Margaret Dashwood in the BBC serial Sense and Sensibility (2008). She portrayed the mysterious model Raphina in the 2016 film Sing Street, a ghost Polly Parsons in the 2016 film I Am the Pretty Thing That Lives in the House and Countess Helena Andrenyi in the 2017 adaptation of Murder on the Orient Express.
She played Freddie Mercury's partner, Mary Austin, in the biopic Bohemian Rhapsody (2018), for which earned the cast a nomination for Outstanding Performance by a Cast in a Motion Picture at the 25th Screen Actors Guild Awards. She portrayed Astrid Sloan in the Netflix series The Politician (2019–2020).
Known For

A Cruel Love: The Ruth Ellis Story
Ruth Ellis · (4 episodes)
2025

The Greatest Hits
Harriet Gibbons
2024

Barbie
Proust Barbie
2023

Chevalier
Marie Antoinette
2023

The Pale Blue Eye
Lea Marquis
2022

Why Didn't They Ask Evans?
Frankie Derwent · (3 episodes)
2022

The Ipcress File
Jean Courtney · (6 episodes)
2022

Glimpse
Rice
2021

Locked Down
Charlotte
2021

Ben Platt: Live from Radio City Music Hall
Self
2020

Modern Love
Paula · (1 episode)
2019

The Politician
Astrid Sloan · (15 episodes)
2019

The Kelly Clarkson Show
(1 episode)
2019

Bohemian Rhapsody- The Complete Live Aid Performance
Mary Austin
2019
Rami Malek: Becoming Freddie
Self / Mary Austin
2019

Bohemian Rhapsody
Mary Austin
2018

Apostle
Andrea
2018

Let Me Go
Emily
2018

Murder on the Orient Express
Countess Elena Andrenyi
2017

Rebel in the Rye
Claire Douglas
2017

Gypsy
Allison Adams · (10 episodes)
2017

The Blackcoat's Daughter
Rose
2017

Don't Knock Twice
Chloe
2017

The Dreams of Bethany Mellmoth
Bethany Mellmoth
2017

I Am the Pretty Thing That Lives in the House
Polly Parsons
2016

Lock In
Lucy
2016

Sing Street
Raphina
2016

Life In Squares
Angelica Garnett · (3 episodes)
2015

Late Night with Seth Meyers
Self · (1 episode)
2014

Hymn to Pan
Holliday
2014

Copperhead
Esther Hagadorn
2013

400 Boys
Heidi
2013

Mo
Henrietta Norton
2010

Ballet Shoes
Posy Fossil
2008

Miss Potter
Young Beatrix
2006
See You When I See You

Sense and Sensibility
Margaret Dashwood · (3 episodes)
2008

Lewis
Zoe Suskin · (1 episode)
2007

The One Show
Self · (1 episode)
2006