​Robert Sean Leonard (born February 28, 1969) is an award-winning American actor.
He has regularly starred in Broadway and off-Broadway productions, but is most known for his roles on House and in Dead Poets Society.
Dead Poets Society
Neil Perry
Swing Kids
Peter Müller
The Age of Innocence
Theodore "Ted" Archer
Driven
Demille Bly
My Best Friend Is a Vampire
Jeremy Capello
Tape
Jon
The I Inside
Peter
Much Ado About Nothing
Claudio
Married to It
Chuck Bishop
Chelsea Walls
Terry Olsen
In the Gloaming
Danny
A Glimpse of Hell
LT(JG) Dan Meyer
A Painted House
Jesse Chandler
The Last Days of Disco
Tom
Safe Passage
Alfred
Eugene O’Neill: A Documentary Film
Self
The Boys Next Door
Barry Klemper
Ground Control
Cruise
Killer: A Journal of Murder
Henry Lesser
Mr. & Mrs. Bridge
Douglas Bridge
Standoff
Agent Jamie Doolin
Dead Poets: A Look Back
The Manhattan Project
Max
Bluffing It
Rusty Duggan
My Two Loves
Larry Taylor
I Love You, I Love You Not
Angel of Death
Normandy: The Great Crusade
Robert Sales (voice)
Into the Deep: America, Whaling & The World
Herman Melville (voice)
The Invention of Love
Young Housman
House M.D.: The Doctor Directs
Reluctant Saint: Francis of Assisi