Tania Raymonde Helen Katz (born March 22, 1988) is an American actress. She played Alex Rousseau in the ABC series Lost from 2006 to 2010, and Cynthia Sanders on the Fox sitcom Malcolm in the Middle between 2000 and 2002. She has appeared on MTV's Death Valley (2011), in the horror film Texas Chainsaw 3D (2013). She notably portrayed infamous convicted killer Jodi Arias in the Lifetime biographical film Jodi Arias: Dirty Little Secret (2013). In April 2015, she joined the cast of the TNT series The Last Ship. From 2016 to 2021, she starred in the Amazon Prime Video series Goliath.
Early life Tania Raymonde Helen Katz was born in Los Angeles, United States to an American father of Russian Jewish descent and a French Catholic mother from Corsica. She attended Lycée Français de Los Angeles. Raymonde is bilingual and fluent in French.
She was engaged to artist Zio Ziegler. Since July 2025, she has been in a relationship with actor Nathan Fillion.
Career Raymonde's first television role was as Alice/Young Syd in the "Syd in Wonderland" episode of the TV series Providence. She subsequently appeared on other TV series, including The Brothers Garcia, The Nightmare Room, That's So Raven, The Guardian, Lost, Medium, Malcolm in the Middle, and NCIS.
She starred in the film Children on Their Birthdays (2002), her first feature film role. In 2003 she played Lauren O'Keefe in the sitcom The O'Keefes.
She is most known for her work on the ABC drama Lost, where she played Alex Rousseau, the adopted daughter of Benjamin Linus, played by Michael Emerson.
She also appeared in the films The Garage (2006), The Other Side of the Tracks (2008), Japan (2008), Chasing 3000 (2008), and Elsewhere (2009). She recurred opposite the late Dennis Hopper on the Starz series Crash. Raymonde also had a recurring role as Frankie Rafferty, Danny Pino's love interest, on season 6 of Cold Case.
She appears in the music video for Maroon 5's "Won't Go Home Without You".
In 2013, Raymonde appeared in two episodes of the NBC series Chicago Fire as a backdoor pilot to set up the spin-off series Chicago P.D. but left the project before the show began. Raymonde also portrayed the infamous convicted murderer Jodi Arias in the Lifetime original movie Jodi Arias: Dirty Little Secret (2013).
From 2016 to 2021 she starred in the Golden Globe-winning Amazon series Goliath, alongside Billy Bob Thornton.
Filmography
Film Year Title Role Notes 2002 Children on Their Birthdays Lily Jane Bobbit 2006 Bonnie Jean "B.J." Direct-to-DVD 2008 Japan Mae Foreign Exchange Anita Duarte 2009 GoodSam and Max Sam Short film Elsewhere Jillian Ethyl Wild Cherry Helen McNicol Still Waiting... Amber Direct to-DVD 2010 The Other Side of the Tracks Amelia TV to-DVD Chasing 3000 Kelly 2011 Chillerama Zelda (segment "Wadzilla") Direct to-DVD Losers Take All Wendy Horowitz Trophy Kids Tiffany 2012 Crazy Eyes Autumn Blue Like Jazz Lauryn Hatching Max Shell Short film 2013 Texas Chainsaw 3D Nikki 2014 Manson Girls Leslie Van Houten 2017 Dirty Lies Amber 2019 Cliffs of Freedom Anna Christina 2020 Deep Blue Sea 3 Emma Collins Direct to-DVD 2022 Futra Days Nichole2023WaldenDetective Sally Hunt2024Getting Lost Herself
Television Year Title Role Notes 2000 Providence Alice / Young Syd Episode: "Syd in Wonderland" Nicole Episode: "No hablo Espanol" 2000–2002 Malcolm In The Middle Cynthia 4 episodes 2001 Beth Episode: "Scareful What You Wish For" 2003 That's So Raven Carly Episode: "Saving Psychic Raven" Lauren O'Keefe 8 episodes Petra Episode: "Big Coal" 2005 NCIS Anna Real Episode: "An Eye for an Eye" 2006 Medium Taylor Greene Episode: "S.O.S." 2006–2010 Lost Alex Rousseau 21 episodes 2008 Nika Episode: "Five Little Words" CSI: NY Laura Roman Episode: "The Cost of Living" Amelia TV movie 2008–2010 Cold Case Frankie Rafferty 8 episodes 2009 Bones Lexi Episode: "Mayhem on a Cross" Crash Roxanne Thigpen 2 episodes Law & Order: Criminal Intent Shelley Smith/Birgit Kaspers Episode: "Revolution" 2010 Sarah Poole Episode: "Mama Jane" Look: The Series Courtney 3 episodes 2011 Hawaii Five-0 Melanie Ayres Episode: "Ma'eme'e" Death Valley Officer Carla Rinaldi 12 episodes 2012 90210 Sonia 3 episodes Switched at Birth Zarra 10 episodes 2013 Chicago Fire Officer Nicole Sermons 2 episodes Jodi Arias: Dirty Little Secret Jodi Arias TV movie 2014Intelligence Emily Episode: "Secrets of the Secret Service" The Big Bang Theory Yvette Episode: "The Locomotive Manipulation" 2015 CSI: Crime Scene Investigation Tina Episode: "Hero to Zero" 2015–2016 The Last Ship Valerie Raymond 4 episodes 2016–2021 Goliath Brittany Gold 24 episodes 2023 S.W.A.T. Abby Episode: Witness NCIS Chloe Marlene Episode: Evil Eye 2024 The Lincoln Lawyer Trina Rafferty Episode: Strange Bedfellows
Music videos Year Title Artist 2007 "Won't Go Home Without You" Maroon 5 2009 "I Couldn't Love You" Cursive 2011 "Red Alert" Arshad Aslam 2014 "Killing Days, Living Nights" Keram Malicki-Sánchez
Director Year Title Role Notes 2006 Cell Division Short Also writer 2017 "Without You" Music video
See also
List of Corsican people
References
External links