Rebel plays Stephanie Conway, a role of a cheerleader who has been in a coma for 20 years.
Once she comes out from coma, she decides to go back to high school and redo her senior year.
She carry one of her best looks on the movie's special screening red carpet in California.
On May 10, the 42-year-old Rebel wear a custom off-the-shoulder green gown by Jason Wu.
In her sequins dress, along with her beach waves, Rebel giving off major mermaid vibes.
Once she posted the photos to her Instagram, she was flooded with comments from fans who loved her look.
Rebel also wowed her fans when she wear a lime green St. John dress and coat.