Dr. Remy Hadley’s nickname in House M.D. is Thirteen.
Remy Hadley joins House’s diagnostic team during the selection process in the fourth season. House labels the applicants with numbers, and Hadley is identified as number 13. The number remains her nickname after she becomes part of the team, making “Thirteen” one of the show’s most recognizable character names.
Actress Olivia Wilde played Hadley. The character is a physician whose personal history and medical decisions become major elements of later storylines. Her bisexuality, inherited risk of Huntington’s disease, and relationships with other characters are explored across the series.
A common mix-up is treating Thirteen as her given name. It is a nickname for Remy Hadley, not a separate identity. The character’s surname is also sometimes written incorrectly because “Hadley” is less frequently repeated than the nickname used by House and her colleagues.