Actress Dawson of “The Hunger Games: Mockingjay”

STEF

She played a rebellious filmmaker in the Divergent series and shares her first name with a famous tennis star.

This clue refers to Stef Dawson, the Australian actress who played Annie Cresta in The Hunger Games: Mockingjay – Part 1 and Part 2. The answer is her first name shortened to "STEF," which is how she’s often credited or informally known. If you’re familiar with the films or cast names, this should click right away.