Persis Khambata shaving her head for (IMO, the best) Star Trek.
Charlize Theron shaving her head for “Mad Max: Fury Road”
Sigourney Weaver shaving her head for "Alien 3"
Karen Gillan shaving her head for “Guardians of the Galaxy”
Natalie Portman shaving her head for "V for Vendetta"
Cate Blanchett shaving her head for “Heaven”
Demi Moore shaving her head for “G.I. Jane”
Ellen Page shaving her head for “Mouth To Mouth”
Robin Tunney shaving her head for “Empire Records”