Born in Lindsay, Ontario, Canada, Park began her acting career with small parts starting at age 6. She attended Oakridge Secondary School, in London, Ontario. She was also a part of the Original Kids Theatre program.

Her first major roles came with a guest spot on the Lifetime series Angela's Eyes and a minor role in the indie movie Charlie Bartlett.

Park completed a guest starring role on the popular Family channel show Life with Derek as Amy, a love interest of Derek and head cheerleader ex-girlfriend to Max. Her largest role to date has been in the ABC Family series The Secret Life of the American Teenager, where she plays supporting character Grace Bowman, a conservative Christian teen and cheerleader who, along with her boyfriend, struggle with her purity vow until marriage.

Park created a band with singer Codi Caraco called Frank and Derol, in which she formally sang and played bass guitar. The girl-band also includes pop star Miley Cyrus's older half-sister, Brandi Cyrus. As of 2010, Park has left the band to focus on her acting career in the tv series The Secret Life Of The American Teenager.