Olivia Hastings Holt was born in Germantown, Tennessee, to parents Mark and Kim Holt. Her older sister is Morgan Toll and she has a younger brother named Cade. At age 3, her family moved to Nesbit, Mississippi where she grew up after briefly living in Memphis. Holt has long enjoyed gymnastics and cheerleading, and she is currently appearing in the Disney XD show Kickin' It. She currently resides in Los Angeles, California with her family.
Holt began her acting career when she started performing in local theater productions. She has appeared in several television commercials, including Hasbro, Kidz Bop 14, Mattel, Bratz dolls, Littlest Pet Shop, and Girl Gourmet.
Holt auditioned for Disney XD martial arts show Kickin'it, which premiered in 2011. Possessing skills in gymnastics, she received a call back from the producers and joined the cast in the same year. She has appeared in every season to date.
Holt starred in the Disney Channel original film Girl vs Monster. She plays the lead character Skylar Lewis, a teenage girl that discovers her family have long worked as monster hunters, and she's next in line. The film premiered in October 2012. She recorded three songs for the movie, which will be released as a part of the Ultimate Make Your Mark Playlist.