Karen Gillan revealed she had shaved off all her hair during a press conference at Comic-Con in San Diego this past weekend.
The 25-year-old "Doctor Who" star made the revelation by taking off her wig in the middle of a Q&A session.
Gillan also announced that she'd be joining the star-studded cast of Marvel's upcoming movie "Guardians of the Galaxy" as super-villainess, Nebula.
According to IMDb, the film is about "a jet pilot [that] gets stranded in space, and must unite a diverse team of aliens to form a squad capable of defeating cosmic threats."
Other cast-members in "Guardians of the Galaxy" include Benicio Del Toro, Lee Pace, Glenn Close, John C Reilly, Chris Pratt and Zoe Saldana. The film is expected to premiere sometime in 2014.