Sydney Sweeney rose to the spotlight when she bagged a role in HBO's "Euphoria."

She locked herself in a basement while preparing for "The Ward."

Although her parents considered it strange, they eventually acquiesced to her request.

To prepare for "Euphoria," she creates a book that delineates the timeline of her character's life and interactions.

She also does this immediately after she gets the role.

Sweeney loves to leave her comfort zone.

According to her, it's an avenue to pull challenging roles and invariably learn more.

In her teenage years, she learned martial arts and became skilled in it.

At one point, she won first place in a competition where most of her competitors were boys.