Sender

Premise

After receiving a series of packages containing unnervingly personal items, a woman tumbles down a paranoid rabbit hole to find her mysterious sender.

Cast

Britt Lower as Julia Day, a woman receiving packages she didn't order

Anna Baryshnikov as Tatiana Day, Julia's sister

David Dastmalchian as Charlie, a delivery driver for the e-commerce company Smirk

Rhea Seehorn as Whitney, a woman who meets Julia in a recovery group

Jamie Lee Curtis as Lisa Barr, a woman also receiving packages she didn't order

Utkarsh Ambudkar as Dustin, Julia's former co-worker

Mike Mitchell as Steve, a man on a date with Julia

Ken Jeong as Dick Swope

Edward Torres

Alyssa Limperis

Inger Stratton

Production

In April 2025, it was reported that Russell Goldman was writing and directing the film, starring Britt Lower, Jamie Lee Curtis, Anna Baryshnikov, and David Dastmalchian, with Curtis also serving as a producer. Principal photography began that month. It is loosely based on the 2022 short film Return to Sender by Goldman. The script for Sender was featured on The Black List in 2023. In August 2025, Curtis described the film as a psychological thriller. In October 2025, Rhea Seehorn was announced as joining the cast.

Release

Sender had its world premiere in competition at SXSW on March 14, 2026. It played as a Marquee Presentation at the San Francisco Film Festival on April 25, 2026.

Reception

On the review aggregator site Rotten Tomatoes, 79% of 38 reviews are positive.

Variety reviewer Courtney Howard states, "Writer-director Russell Goldman re-fashions the puzzle box constraints of his short “Return to Sender” into an intricately-faceted feature, making way for a deep character study to emerge, crawling under our skin to truly unnerve in its damning examination of how commercialism is insidiously interwoven into our daily lives. Boldly off-kilter, brilliant and bizarre, its dark humor and taut psychological horror are laced together in a delightfully heady blend."