Jules de Jongh (born in California) is a British-based American actress, voice actress, singer, television and radio presenter who provides voices for the UK and US dubs of Thomas & Friends.
Jules provides voices in other shows such as Viki and Marco in the US version of "Angelina Ballerina" as well as Lieutenant Green in Gerry Anderson's 2005 reboot of his 1968 series "Captain Scarlet", and Yugo and Evangelyne in "Wakfu". She also provides voices in video games such as "Burnout", "Need for Speed", "Moon Tycoon", "Killzone", "Lego City Undercover" and "Batman: Arkham Knight".
She has narrated several productions for Channel Five in the UK.
- Rosie (thirteenth season - sixteenth season)
- Mavis (Hero of the Rails - Blue Mountain Mystery)
- Lady Hatt (thirteenth season onwards, excluding the seventeenth and twenty-first seasons)
- Bridget Hatt (thirteenth and fourteenth seasons only)
- The Duchess of Boxford (Hero of the Rails onwards, excluding the seventeenth season)
- Bridget Hatt's Friends
- The Teacher (thirteenth season only)
- The Laundry Lady
- The School Children
- The Blond-haired Boy (fifteenth season - eighteenth season)
- The Ginger-haired Boy (Pouty James)
- Some Children (Diesel's Special Delivery, Gordon and Ferdinand, Emily and Dash, Toby and Bash, Percy the Snowman, Steamie Stafford, Emily Saves the World, Sodor's Legend of the Lost Treasure, Pouty James, P.A. Problems and Forever and Ever)
- Emily (US; Hero of the Rails onwards, UK; Thomas & Friends in 4-D: Bubbling Boilers and The Great Race singing voice only)
- Caitlin (Engine of the Future only)
- Allicia Botti
- Will You Won't You (performed)
- Be Who You Are, and Go Far (performed)
- The Most Important Thing is Being Friends (performed)
- Where in the World is Thomas? (performed)