Remy Hadley, played by Olivia Wilde, is the House M.D. character known by the nickname “Thirteen.”
Hadley receives the nickname because she was assigned number 13 during the competition to join House’s diagnostic team. The number remained attached to her character even after the selection process ended, becoming the name colleagues commonly used.
The character is a physician with a complicated personal history and a guarded personality. The series gradually reveals important information about her health, relationships, and family, allowing the nickname to coexist with a more fully developed identity. Olivia Wilde played Hadley across multiple seasons and became one of the show’s most recognizable cast members.
The nickname can cause confusion because “Thirteen” is not her legal first name. Remy Hadley is the character’s name, while Thirteen is the informal label established by the team-selection storyline. Amber Volakis was another doctor connected to that competition, but she is not Thirteen.