Oona Castilla Chaplin (born 4 June 1986) is a Spanish–Swiss actress. Her roles include Talisa Maegyr in the HBO TV series Game of Thrones, Kitty Trevelyan in the BBC drama The Crimson Field, and Zilpha Geary in the series Taboo.
A member of the Chaplin family, she is the daughter of actress Geraldine Chaplin, granddaughter of English filmmaker and actor Charlie Chaplin, and great-granddaughter of Irish-American playwright Eugene O'Neill. She was named after her maternal grandmother Oona O'Neill, Charlie Chaplin’s fourth and final wife.

Avatar 5
Varang
2031

Avatar 4
Varang
2029

Avatar: Fire and Ash
Varang
2025

Heroic Dose
The Moon
2025

Treason
Maddy De Costa · (5 episodes)
2022

Lullaby
Rachel
2022

Made for Love
Alice · (1 episode)
2021

The Comey Rule
Lisa Page · (2 episodes)
2020

Epicentro
Herself
2020

Guardians of Life
2020

My Dinner with Hervé
Katie
2018

Anchor and Hope
Eva
2017

Taboo
Zilpha Geary · (8 episodes)
2017

Realive
Naomi
2016

Cain's Father
Mercedes · (2 episodes)
2016
Dancing for My Havana
Rosa
2015

The Longest Ride
Young Ruth
2015

A Quiet Night In
Sabrina
2014

The Crimson Field
Kitty Trevelyan · (6 episodes)
2014

Purgatory
Marta
2014

Aloft
Alice
2014

Inside No. 9
Sabrina · (1 episode)
2014

Salar
Sandra
2014
Hoke
2014

Powder Room
Jess
2013

What If
Julianne
2013

Dates
Mia · (5 episodes)
2013

The Sorrows
Sarah
2013

The Hour
Marnie Madden · (12 episodes)
2011

Game of Thrones
Talisa Stark · (5 episodes)
2011

What's a Bear For?
Rosa
2011

The Devil's Double
Beauty
2011

Salar
Sandra
2011

Sherlock
Jeanette · (1 episode)
2010

Pelican Blood
Linda
2010

El Gordo: A True Story
Silvia · (2 episodes)
2010

Married Single Other
(2 episodes)
2010

Imago Mortis
Arianna
2009

Quantum of Solace
Perla de las Dunas Receptionist
2008

Inconceivable
Laura Chappel
2008
Mapuche, brotes de la tierra

Spooks: Code 9
(1 episode)
2008

El hormiguero
Self · (1 episode)
2006

Spooks
Kate · (1 episode)
2002