What is Robert Sean Leonard's net worth? Robert Sean Leonard's net worth is $15 million dollars. Born in Westwood, New Jersey, Robert Sean Leonard, also known as Robert Lawrence Leonard, attended Fordham University, and eventually graduated from Columbia University. He began his professional acting career onstage, replacing Matthew Broderick in the Broadway production of "Brighton Beach Memoirs". He then went on to appear in a number of notable Broadway productions, and launched a successful film and television career. He has appeared in such films as "Dead Poets Society", "Mr. & Mrs. Bridge", "Swing Kids", "Much Ado About Nothing", "The Age of Innocence", and "A Painted House". He has also appeared on Broadway in such productions as "Candida", "The Iceman Cometh", and "The Violet Hour". From 2004-2012, he played Dr. James Wilson on the hit television show, "House". He has won one Tony Award and has been nominated for two more.