She is known for her role as Bridget Forrester in the American soap opera The Bold and the Beautiful from 2000 to 2004, for which she won three Daytime Emmy Awards for Outstanding Younger Actress in a Drama Series.

In early 1999, she appeared in one episode of "Big Wolf on Campus" and throughout the end of 1999, she starred in a sitcom called Student Bodies playing the role of Kim McCloud in the show's final season.

Throughout the first half of 2000, she played the character "Tara" in the episode "The Tale of the Last Dance" in Season 7 of Are You Afraid of the Dark?, as well as making a guest appearance on La Femme Nikita.

In mid-2000, Finnigan moved to the United States and got the role of Bridget Forrester in the long-running soap opera The Bold and the Beautiful in July 2000.

In December 2000, she also starred in a true story in the telefilm The Stalking of Laurie Show about the real life murder of a young teenage girl.

Following her departure from the show, she played the character Marni Fliss on the NBC series Committed, which only aired for 13 episodes before being cancelled due to low ratings.

Starting in the fall of 2005, Finnigan was the star of the CBS television drama series Close to Home, playing a deputy district attorney.

In 2013, she starred on the TNT series Monday Mornings on which her real life husband Jonathan Silverman was a recurring cast member.