Katherine Propper is a writer-director born and raised in Los Angeles. Her feature directorial debut, LOST SOULZ premiered at the Tribeca Film Festival 2023, where it was acquired by distributor Kino Lorber for theatrical release in 2024.

Her 2022 short film BIRDS won the Grand Jury Prize at AFI Fest, a Special Jury Award for Vision at SXSW, and a Special Jury Prize in the International Competition at Clermont-Ferrand in France.