[11][10][better source needed] From 2012 to 2016, Berglund starred as Bree Davenport, an overly outgoing, bionic super-human with super speed, in the Disney XD live-action comedy series Lab Rats alongside co-stars Tyrel Jackson Williams, Billy Unger, and Spencer Boldman.

[13][14] In 2013, Berglund guest starred on the Disney XD series Kickin' It, where she played karate prodigy Sloane Jennings.

[15] In mid-2013, Berglund began work on the 2013 Disney Channel Original Movie, How to Build a Better Boy, in which she stars as Mae Hartley, a tech-savvy young woman who along with her best friend, devises a plan to create the perfect boyfriend.

[22] In 2019, Berglund was cast in the recurring role of Olivia in the fourth season of the drama television series Animal Kingdom.

[23] Berglund also had a minor role as a teen in a Billie Eilish costume in the 2020 Netflix comedy film Hubie Halloween.

[24] In 2021, Berglund had a supporting role in the crime drama film Cherry starring Tom Holland and Ciara Bravo, directed by Anthony and Joe Russo, based on the 2018 novel of the same name by Nico Walker.

[25] In 2024, Berglund starred alongside Amadeus Serafini in the romantic comedy film by Tosca Musk's titled Wallbanger.