In 2021, Mills landed her first role in television, starring in the
Amazon Prime Video series The Summer I Turned Pretty.[1][2][3] Mills' character, Shayla, did not appear in the
book trilogy upon which the television series was based, and the role was written exclusively for Mills.[3][4] The series premiered in 2022.[5] In April 2023, Mills announced that she would not be returning to the series for season two.[6][7] Jenny Han, the show creator and author of the book series later stated that Mill's character was written out of the show because the timeline in season two did not allow them to keep all of the charcaters for season one.[8]
In October 2022, Mills was cast as Jen Yung in the
Netflix series Obliterated.[9] The series was cancelled after one season.
In February 2023, Mills starred in an audio rom-com series titled Dump Him!.[10]