[4] Marshall attended Lester B. Pearson School for the Arts, starting to act at the early age of 11; growing up, she went to the Original Kids Theatre Company.

In 2003, she was nominated for a Los Angeles-based Young Artist Award for Best Performance in a TV Movie, Miniseries or Special for Leading Young Actress for The Elizabeth Smart Story,[6] a movie-of-the-week based on the true story of the 2002 kidnapping of Utah teenager Elizabeth Smart.

[2] In 2015, Heartland surpassed Street Legal as the longest-running one-hour scripted drama in the history of Canadian television.

[1] As of 2016, Marshall lives on a farm ranch outside Calgary, Alberta with her husband Shawn Turner and their animals.

[10] In between filming seasons of Heartland, Marshall helps out at a local veterinary clinic and spends time with her many animals on her farm ranch near Calgary, Alberta.