Born and raised in Los Angeles, California, Belle began her acting career with appearances in numerous television commercials before landing her first lead role in NBC's thriller, Trapped Beneath the Earth in 1992.

She has since appeared in a variety of films and television shows, including The Lost World: Jurassic Park (1997), Practical Magic (1998), Rip Girls (2000) and 10,000 BC (2008).

In addition to her acting career, Belle has been the face of Vera Wang's "Princess" fragrance and has appeared in advertisements for brands such as Nespresso and Cotton.

An only child, Belle was born on October 2, 1986[2][3] to Deborah Cristina Gould of a Brazilian background[4] and Jack Wesley Routh, a country music performer and composer.

Belle began her career as a child actor appearing in television commercials for brands such as Cabbage Patch Kids, Campbell's Soup, Public Broadcasting System and Eli Lilly Pharmaceutical.

In the science fiction film The Lost World: Jurassic Park (1997), she played Cathy Bowman, a young wealthy British girl attacked by a pack of Compsognathus.

[11] In 2006, she signed a multi-year contract to become the face of Vera Wang's "Princess" fragrance, appearing in print advertisements and television commercials.

[21][22] In November 2016, Belle appeared as a guest judge on Bravo's television series Project Runway, in the episode "A Power Trip".

[23] She played Isabel Wallace in the drama-thriller film The Mad Whale (2017), a student project produced by James Franco's Elysium Bandini Studios and the USC School of Cinematic Arts.

[43] People wrote that Belle "managed to look appropriate and fashion-forward at every event she went to this week, including Max Azria, Oscar de la Renta and Miss Sixty.