Which character did Olivia Wilde play in House M.D.?

Olivia Wilde played Remy Hadley in House M.D.

Remy Hadley, better known by her nickname “Thirteen,” is a physician recruited to House’s diagnostic team. The character is a skilled internist whose private life and medical history become important parts of the series. Wilde portrayed Hadley from season 4 onward and became one of the show’s most recognizable later cast members.

The nickname “Thirteen” comes from her position in the competition House uses to select new team members. Her surname is Hadley, while Remy is her first name; many viewers know the character primarily by the nickname rather than her full name.

Hadley’s story includes her diagnosis with Huntington’s disease, an inherited neurological disorder. This storyline shapes her relationships, career decisions, and attitude toward experimental treatment. Wilde’s character is sometimes confused with Jennifer Morrison’s Allison Cameron, who belongs to House’s original team.