Add: “Hollywood bombshell ballgown” to the press tour wardrobe essentials list, care of Sydney Sweeney.

The actor is out on her press tour for her forthcoming film Echo Valley . Starring opposite Julianne Moore , Sweeney plays Moore’s daughter and addict Claire in a psychological thriller about how far a mother will go for their child.

“My character Claire is not the best daughter and she puts her mom through a lot,” Sweeney told Good Morning America .

Claire, she explained, “shows up covered in blood at her mother's doorstep.”

For last night’s premiere, Sweeney upped the drama in a different way, stepping out for the screening in the custom Vera Wang, scarlet red ballgown.

The crimson red, Italian silk gown features a flared crumb catcher neckline and hand draped peplum. Styled

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