Check out these 19 pre-production gender swaps from some of our favorite movies and shows, ahead.

Rosalind Russell played the role opposite Cary Grant in the classic film.

Jodie Foster inElysium

Jodie Fosterplayed the ruthless Secretary Delacourt inNeill Blomkamp’s 2013 sci-fi thrillerElysium.

The Characters Written One Way and Cast Another

Lucasfilm; Patrick Ecclesine/Warner Bros./Getty Images; Andrew Schwartz; Ron Batzdorff

The rest is history.

At that point, writer-directorJ.J.

Helen Mirren inMonsters University

Pixar wasn’t done gender-swapping withFinding Nemo.

Scott Patterson (Luke Danes)

Patrick Ecclesine/Warner Bros./Getty Images

In Dan Scanlon’s 2013Monsters Inc.follow-upMonsters University, Dean Hardscrabble was originally conceived as a male character.

Sigourney Weaver in Alien

Bob Penn/20TH Century Fox

Rosalind Russell in His Girl Friday

Courtesy Everett Collection

Angelina Jolie in Salt

Andrew Schwartz, SMPSP

Katee Sackhoff in Battlestar Galactica

Justin Stephens/SyFy

Jodie Foster in Elysium

Kimberley French

Jane Lynch in The 40-Year-Old Virgin

Universal/Courtesy Everett Collection

Mark Hamill in Star Wars

Lucasfilm

Gwendoline Christie in Star Wars: The Force Awakens

Lucasfilm

Judi Dench in the Bond Movies

Jay Maidment

Ellen DeGeneres, Dory, Finding Nemo

Pixar/Disney; Alberto E. Rodriguez/Getty Images

Jodie Foster in Flightplan

Ron Batzdorff, SMPSP

Helen Mirren in The Tempest

Melinda Sue Gordon

Tilda Swinton in Snowpiercer

Radius/The Weinstein Company

Glenn Close in The Paper

Universal/Courtesy Everett Collection

Grace Jones in Conan the Destroyer

Universal/Courtesy Everett Collection

Helen Mirren in Monsters University

Disney/Pixar; Amanda Edwards/WireImage

Sandra Bullock in Our Brand Is Crisis

Patti Perret

Jessica Chastain in Interstellar

Melinda Sue Gordon