Eep, voiced by Emma Stone, is the movie's heroine, and she is one tough cavewoman. Eager to break free of her dad's strict rules and her family's cave, Eep pushes her family to explore their changing world, embrace her new forward-thinking friend, Guy (who she has no problem throwing over her shoulder), and come together like never before.
Emma Stone fans, look closely at Eep's facial expressions; they'll probably look familiar! Filmmakers "discovered the joys of Emma Stone" during performance tests and incorporated her expressive nature into the character.
Source: DreamWorks Animation