Natalia Gastiain Tena is a British actress and musician. She is best known for playing Nymphadora Tonks in the Harry Potter film series (2007–2011), and the wildling Osha in the HBO series Game of Thrones (2011–2013; 2016).
Tena is the lead singer and of Molotov Jukebox. The band released their debut album Carnival Flower (2014), in Spring 2014, featuring their single "Neon Lights". Their second studio album, Tropical Gypsy (2016), was released on 15 April 2016 and was preceded by its lead single, "Pineapple Girl". It was promoted on the band's Tropical Gypsy Tour in April and May 2016.
Tena is fluent in English and Spanish language. She attended Bedales School in Hampshire.
She was taught the piano by her mother at five years old, influenced by Chuck Berry's music. Afterwards, at 18, Tena moved back to London and busked on the London Underground. While working with a theatre group called Kneehigh Theatre, where they were allowed to pick an instrument to play, Tena decided to learn the accordion.
In 2007, Tena appeared in the film adaptation of Harry Potter and the Order of the Phoenix playing the character Nymphadora Tonks. Tena reprised this role in its sequels Harry Potter and the Half-Blood Prince, in 2009, Harry Potter and the Deathly Hallows – Part 1 in 2010 and Part 2 in 2011.
She hosted a behind-the-scenes featurette entitled "Trailing Tonks" for the subsequent DVD and Blu-ray release, and is credited as producer and director of the featurette, in which she also performs an original Christmas-themed blues song on guitar, which she composed while working as a busking on the London Underground."Trailing Tonks" (2007), a featurette on the DVD release of Harry Potter & the Order of the Phoenix
In 2011, she played a lead role in the Scottish Film You Instead. She also appeared as Osha in HBO's Game of Thrones. In March 2013, she starred in the official music video for Brainfeeder's single "Without You (ft. Kerry Leatham)".
In 2014, Tena co-starred as a mentally ill woman in the Black Mirror Christmas episode "White Christmas".
In 2015, she starred as the lead, Jennifer Preston, in the British mini-series Residue. In 2017, Tena was cast as Sara Morten in the CBS drama Wisdom of the Crowd.
Tena played the series regular role of Lana Pierce on the YouTube science fiction series Origin (2018).
| 2002 | About a Boy | Ellie | Credited as Nat Gastiain Tena |
| 2005 | The Fine Art of Love | Vera | |
| Mrs Henderson Presents | Peggy | ||
| 2007 | Harry Potter and the Order of the Phoenix | Nymphadora Tonks | |
| 2008 | Lecture 21 | Thomson | |
| 2009 | Harry Potter and the Half-Blood Prince | Nymphadora Tonks | |
| 2010 | Womb | Rose | |
| Ways to Live Forever | Annie | ||
| Harry Potter and the Deathly Hallows – Part 1 | Nymphadora Tonks | ||
| 2011 | Harry Potter and the Deathly Hallows – Part 2 | ||
| You Instead | Morello | ||
| 2012 | Bel Ami | Rachel | |
| 2014 | 10,000 km | Alex | |
| 2015 | SuperBob | Dorris | |
| 2017 | Amar | Madre de Laura | |
| Anchor and Hope | Kat | ||
| 2020 | I Love You, Stupid | Raquel | |
| Baby | Albinoa | ||
| 2023 | Katia Javanavič | ||
| Borderline | Joan | ||
| 2024 | The Platform 2 | ||
| 2025 | El mal |
| 2005 | Doctors | Amy Emerson | Episode: "Boundaries" |
| 2006 | Afterlife | Gemma Taylor | Episode 205: "Mirrorball" |
| 2011–2013; 2016 | Game of Thrones | Osha | Recurring role (season 1–3, 6) |
| 2012 | Shameless | Aparecida | Episode: "The Brazilian Effect" |
| Falcón | Christine Ferrera | 2 episodes | |
| 2013 | Ambassadors | Tanya | Main role |
| Black Mirror | Jennifer | Episode: "White Christmas" | |
| 2015 | Residue | Jennifer Preston | Main role |
| The Refugees | Emma Oliver | ||
| 2017–2018 | Wisdom of the Crowd | Sara Morten | |
| 2018 | Origin | Lana Pierce | |
| 2019 | The Mandalorian | Xi'an | Episode: "" |
| 2021–present | Wolfe | Val Kinteh | Main role |
| 2022 | Rebekah Vardy | ||
| 2025 | Riot Women | Inez | |
| 2004 | Gone to Earth | Hazel | Shared Experience / UK tour |
| 2005 | Bronte | Cathy / Bertha Mason | |
| 2006 | Nights at the Circus | Fevvers | Kneehigh Theatre / UK tour |
| 2008 | The Clean House | Matilde | UK tour |
| 2009 | Othello | Desdemona | Royal Shakespeare Company / UK tour |
| 2019 | Europe | Katia | Donmar Warehouse |
|
|