In addition to voicing the titular character, Auli'i Cravalho also sings the opening theme song.
Hailey's younger twin brothers are named Dwayne and Johnson. This is a reference to athlete turned actor Dwayne Johnson who voiced Maui in Disney's Moana, where Auli'i Cravalho also voiced the titular character.
Hailey is the fourth Disney character that Auli'i Cravalho has performed as an actress, the third as a voice actress, and the second main character of a film or television series after Moana.
Despite playing teenagers, Auli'i Carvahlo and Manny Jacinto were 22 and 36 respectively at the time of the show's premiere.
Sarah Chalke voices The Professor, a time traveling scientist from the future who wears a lab coat. In the Adult Swim / Cartoon Network series Rick and Morty, Chalke voices the daughter of Rick Sanchez who is a scientist always sporting a lab coat, and mother of Morty Smith. Both characters often time travel.