Dr. James Wilson is the character’s full name in House M.D.
Wilson is played by Robert Sean Leonard and serves as the head of oncology at Princeton-Plainsboro Teaching Hospital. He is one of House’s closest friends and often acts as a moral counterweight to House’s impulsive or confrontational behavior.
The friendship between House and Wilson is one of the show’s most important continuing relationships. Their contrasting personalities create both comedy and drama: House favors provocative deductions and rule-breaking, while Wilson is generally more empathetic and attentive to patients and colleagues.
Because the character is usually addressed by his surname, some viewers remember him simply as Wilson. The first name James is also used in formal records and in storylines involving his family and personal life. Robert Sean Leonard is the actor, not the character’s name.