Chelsea was born in Toronto, Ontario where she took an interest in music at a young age (singing and then piano). While taking lessons she ventured into musical theatre and performed in Legally Blonde, A Christmas Carol, Aladdin and more. Chelsea was also in local operas such as: Carmen, Tosca and La Boheme.
As Chelsea was attending a master class at her music school the agent leading the class took an interest in her and asked her to audition. Soon after being signed she had her first role as Dhara on a season one episode of the ABC/Global hit show Rookie Blue (2010). She went on to play recurring roles in Life with Boys (2011) and The Stanley Dynamic (2014).
She's starred in commercials for various products but is sometimes recognized as "the girl on the phone" in a 2015 Government of Ontario sponsored commercial against sexual violence tagged #WhoWillYouHelp.
- She appeared in a PSA alongside cast member Amanda Arcuri.
- She is a Taurus.
- She does and teaches gymnastics.
- She has a younger sister named Gillian.
- She had been auditioning for Degrassi since she was 13.
- She had auditioned for Becky Baker.
- She is the third person with the last name Clark to star in the Degrassi franchise, the other two being Daniel Clark and Annie Clark.