Remy Hadley uses the nickname Thirteen on House’s diagnostic team in House M.D.
Olivia Wilde portrays Hadley, who joins House’s team after a competitive selection process. The nickname comes from her position in that process: she is identified as applicant number thirteen. House and the other doctors use the number as a practical label, and it remains attached to her even after her identity becomes familiar.
Hadley’s character is also defined by a serious hereditary medical issue and by her guarded approach to personal information. The show gradually reveals more about her family history, relationships, and medical decisions, making her one of the team members whose private life is closely connected to the cases.
The nickname is easy to confuse with “Foreteen,” a fan term referring to Hadley’s relationship with Eric Foreman. “Foreteen” is not her individual nickname. Thirteen is the canonical name used for the character, while Remy Hadley is her real name.