[8] She has starred in several further films including The Legend of Billie Jean (1985), Ruthless People (1986), The Secret of My Success (1987), and City Slickers (1991).

Following Supergirl, Slater has made multiple appearances in Superman media such as Superman's mother Lara-El in the TV series Smallville,[9] Supergirl's adoptive mother Eliza Danvers in the Supergirl TV series, and Clark Kent's adoptive mother Martha Kent in DC Super Hero Girls: Hero of the Year and the associated film.

Slater's likeness was used to portray Supergirl in a CGI cameo appearance in the film The Flash (2023).

[10] In 1987, Slater co-founded the New York theater group, Naked Angels, with Gina Gershon.

The tracks were real-time recordings with Slater singing and playing piano, accompanied by six other musicians; no multitracking, editing, or dubbing was employed.