OF ALL THE dramatic introductions in the Star Wars series, few are as mysterious, or as crucial, as the very first scenes of Carrie Fisher as Princess Leia in 1977’s A New Hope. Standing amid a fog of smoke, she deposits a mysterious object into R2-D2 before retreating back into the dark, only to emerge later to fearlessly blast a stormtrooper—all moments that set the original trilogy into motion, and which helped make the then-21-year-old actress one of the most recognizable faces in the world.