What is the nickname of Olivia Wilde’s character in House M.D.?

Olivia Wilde’s House M.D. character is nicknamed Thirteen.

Thirteen is the nickname of Remy Hadley, a physician who joins House’s diagnostic team after the selection process for a new team. The number comes from her position in that competition and becomes the name by which colleagues commonly refer to her. Her actual first name, Remy, is revealed and used at various points in the series.

Wilde played Thirteen from the fourth season onward, with recurring appearances and later regular participation. The character is a skilled doctor whose personal history and health concerns become important parts of her storyline. Her guarded personality also creates tension and sympathy within the team.

Viewers sometimes treat “Thirteen” as the character’s legal name, but it is a nickname. The character’s surname is Hadley, while Remy is her given name. The nickname is therefore the short, canonical answer to questions about Wilde’s role.