The 39-year-old writer debuted a new look on the red carpet this week

Credit: Jon Kopaloff/FilmMagic; Matt Baron/BEImages

Twilight author Stephenie Meyer has a new movie – and an even more dramatic new look!

Wearing a floral dress, a black cardigan and bold red lipstick, Meyer, 39, showed off her dramatic weight loss at Tuesday’s Hollywood premiere of The Host, based on her 2008 science-fiction romance novel.

“It’s kind of an alien love story,” director Andrew Niccol has told PEOPLE.

The movie – due to hit theaters March 29 – stars Saoirse Ronan as Melanie, one of the world’s last remaining free spirits.

As an alien named Wanderer assumes control of Melanie’s soul, Melanie’s remaining emotions still draw her to a handsome human named Jared (Max Irons).