Sarah Michelle Gellar’s Butterfly Dress, Madelyn Cline in Plunging Conner Ives Look and More at ‘I Know What You Did Last Summer’ Premiere

The cast and creative team of the new “I Know What You Did Last Summer” hit the red carpet on Monday night for the film’s premiere in Los Angeles. Designs courtesy of Rachel Gilbert, Oscar de la Renta and more were worn by the stars and special guests at the premiere.

While Sarah Michelle Gellar and Jennifer Love Hewitt brought late ’90s and early 2000s nostalgia, while new and burgeoning talent like Madelyn Cline and Chase Sui Wonders opted for runway pieces. Ahead, WWD breaks down some of the designer looks from Monday’s premiere.

Madelyn Cline

Cline turned to Conner Ives for her attire. The actress wore a sleeveless pink dress with a plunging neckline courtesy of the spring 2025 ready-to-wear collection. The dress featured gathered, cinched fabric at the waist and down the front of the skirt with a slight slit. The body-con look also featured a short train.

Chase Sui Wonders

Wonders embraced corsetry detailing and lingerie inspiration in Wiederhoeft. The buttery yellow minidress featured white lace detailing on the bodice and the skirt. The actress’ look came from Wiederhoeft’s spring 2025 ready-to-wear collection. She accessorized her attire with jewelry by Presley Oldham.

Sarah Michelle Gellar

Gellar went three-dimensional with her attire, favoring a strapless minidress from Oscar de la Renta’s pre-fall 2025 collection. The dress featured a butterfly motif in shades of blue, white, red and black. Gellar paired the dress with pointed toe orange sherbet-tone pumps by Le Silla.

Jennifer Love Hewitt

Hewitt styled the triangle-embellished dress by Rachel Gilbert at the premiere. The sleeveless dress featured allover shimmering details, a motif also featured on her pointed-toe heels, as well. The silhouette included a formfitting aesthetic with a column skirt.

Sarah Pidgeon

Sarah Pidgeon embraced the butter yellow trend with her strapless minidress. The “American Love Story” star wore a look featuring large buttons in a muted butter-yellow tone. She paired the dress with knee-high boots.

“I Know What You Did Last Summer,” a reboot of the 1997 horror film, follows a group of teens terrorized by a mysterious stalker who knows about a gruesome incident from their past. The film hits theaters Friday.