Kristen Stewart highest-paid actress
The 22-year-old earned an estimated $34.5 million from May 2011 to May 2012 and pushed Angelina Jolie into fourth place.
Cameron Diaz, who had a surprise hit with "Bad Teacher," came in second at $34 million.
"She [Stewart] is an up-and-coming star. She is earning a lot of money from one of the most successful franchises of all time. This is who you would expect to see right now," said Dorothy Pomerantz, Forbes Los Angeles bureau chief.
"This year you are seeing somebody young and at the brink of potentially great stardom sitting on the top of the list."
Forbes.com compiled the list and estimated salaries by talking to agents, managers and lawyers and based earnings on pay, profits, residuals, endorsements and advertising work.
Oscar-winner Sandra Bullock, who largely took a break from filming after 2009's "The Blind Side", came third with $25 million.
Jolie, who topped last year's list along with Sarah Jessica Parker, dropped to the fourth spot with earnings of $20 million while Charlize Theron, Stewart's co-star in "Snow White and the Huntsman" who also appears in "Prometheus", trailed at $18 million and rounded out the top five places.