Sadie Sink Joins MCU in Spider-Man Brand New Day

Actress Sadie Sink is set to make her Marvel Cinematic Universe debut in the upcoming film "Spider-Man: Brand New Day," though the identity of her character remains a closely guarded secret. The film, starring Tom Holland as Peter Parker, is scheduled for release in theaters on July 31, 2026.

Sink, known for her role in "Stranger Things," joins a returning cast that includes Zendaya, Jacob Batalon, Jon Bernthal as Frank Castle/The Punisher, and Mark Ruffalo as Bruce Banner/Hulk. Other cast members include Liza Colón-Zayas, Michael Mando, and Tramell Tillman.

In a recent interview, Sink revealed she did not audition for the role, having previously worked with director Destin Daniel Cretton on the 2017 film "The Glass Castle." She also stated she did not receive a script until she arrived in London for filming, a measure attributed to the project's high level of secrecy. Sink praised her co-star Tom Holland for helping her adjust to the large-scale production, noting he was welcoming and made her feel at ease on set.

Despite her absence from the film's marketing materials, speculation about her role is rampant among fans. A prominent theory suggests she may be playing a version of...