Marsha Thomason is best known as Naomi Dorrit in Lost, Tia in The Bay, and Vanessa in The Haunted Mansion.
Films
- The Haunted MansionVanessa / Elizabeth2003
- My Baby’s DaddyBrandy2004
- The TripperLinda2006
- The Black Waters of Echo’s PondVeronica2009
- Welcome to the PunchSarah Hawks2013
- The BayTia2019
TV shows
- The BayTia2019–2022
- White CollarDiana Barrigan2009–2014
- LostNaomi Dorrit2005–2010
- Las VegasNessa Holt2003–2008
- The PracticeRebecca2003
- Where the Heart IsJacque1997–2000
- Peak PracticeJulie1993
- Safe HouseKatherine2015
- The BayTia2019–2022
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About Marsha Thomason
Marsha Thomason is an English actress, born in Manchester, who has built a versatile career in both British and American television and film. She gained international recognition for her roles in major US series such as Lost and White Collar, while also maintaining a strong presence in UK drama.
FAQs
What is Marsha Thomason’s most famous role?
She is widely known for playing Naomi Dorrit in the TV series Lost (2005–2010), a character who arrives on the island as a freighter crew member.
Is Marsha Thomason in White Collar?
Yes, she played FBI Special Agent Diana Barrigan in the USA Network series White Collar from 2009 to 2014.
What British TV shows has Marsha Thomason been in?
She appeared in the long-running ITV drama Where the Heart Is (1997–2000) as Jacque, and more recently in the ITV crime drama The Bay (2019–2022) as Tia.
Did Marsha Thomason star in any Disney films?
Yes, she played Vanessa / Elizabeth in the 2003 Disney film The Haunted Mansion, starring alongside Eddie Murphy.
Where was Marsha Thomason born?
She was born in Moston, Manchester, England, and began her acting career in British television in the early 1990s.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026