SHIMONOSEKI, Yamaguchi Prefecture--A sociable ocean sunfish that clearly missed its human audience and fell sick during renovations perked up after officials set up human cutouts at its aquarium here.

Julia Fox joined her fellow cast members and the creative team of “Idiotka” for the film’s SXSW Film Festival debut on Wednesday in Austin. The “Uncut Gems” star appears in the film alongside Camila ...