Iris Apatow shows off the open back of her dress at the premiere of her new movie Pretty Lethal at 2026 SXSW Film Festival on Friday (March 13) in Austin, Tex.

The 23-year-old actress was joined at the event by her boyfriend, fellow actor Sam Nivola.

Also stepping out were her co-stars Uma Thurman, Maddie Ziegler, Lana Condor, Avantika and Millicent Siummonds, as well as director Vicky Jewson, writer Kate Freund and producers William Bindley and Mike Karz.

Keep reading to find out more…

“In Pretty Lethal, I wanted to bring the highly specific skillset of a ballerina to the action space. We created a world built on the broken dreams of a dancer, played by the iconic Uma Thurman,” director Vicky Jewson previously shared of the film. “This world and our incredible young cast gave me the freedom to swing between horror, comedy and action to create a breathless rollercoaster ride. The troupe embraces team work, sisterhood and ballet-fu in order to stay alive. Dance like your life depends on it!”

Pretty Lethal is slated to premiere March 25th on Prime Video – Watch the trailer and learn more here!

FYI: Iris is wearing a Khaite dress with Christian Louboutin shoes. Maddie is wearing a Dauphinette dress. Lana is wearing a Zimmerman dress. Avantika is wearing an Erik Charlotte look.

Browse through the gallery for more photos of the Pretty Lethal cast at SXSW…