Her character was killed off the series in the season's eighth episode, "Collision" when the series' writers began to feel that the character's "story avenues [were] limited".
Executive producer Carlton Cuse said that Grace's departure from the show was "sort of a win-win" as she was eager to enter a full-time career in film.
She went on to feature in minor roles on the television series CSI: Miami, The Lyon's Den, Miracles, Like Family, Cold Case and Law & Order: Special Victims Unit, and the films Twelve Mile Road and Creature Unknown, before appearing in a season-long recurring role on Oliver Beene as a Swedish exchange student.
In mid-2004, Grace's agent sent her the script for the pilot episode of Lost; she was given the role of Shannon Rutherford after a successful audition.
After the filming of The Jane Austen Book Club was completed, Grace briefly returned to Hawaii to shoot a guest spot on the Lost season 3 episode "Exposé".She was nominated in 2005 for a Teen Choice Award for Choice TV Breakout Performance – Female for her role on Lost, but lost to Desperate Housewives' Eva Longoria.She lived in Hawaii during the filming of the show's first season, and signed on to star opposite Tom Welling in The Fog, a 2005 remake of the 1980 horror film of the same name, as a character originally played by Jamie Lee Curtis.Her family lived in a 200-year-old house, the first saltbox house in central Ohio.She attended Worthington Christian Schools from kindergarten through ninth grade and briefly attended Thomas Worthington High School, where she began acting in school plays and community theater, including a Jewish Community Center's Gallery Players' 2000 production of The Crucible.
She is well known for playing Shannon Rutherford in the TV series Lost.