He played Daniel Day-Lewis's son in the movie "The Age of Innoncence" in 1993.
He is friends with his old co star Ethan Hawke.
Robert's natural hair color is brown.
Robert's Chinese sign is Rooster.
Robert is in the book entitled Conversations In The Wings, edited by Roy Harris which is a book of 13 actors who address questions about technique and preparation for plays.
Robert has done some audio books such as The Secret History by Donna Tartt and The Light In The Forest by Conrad Richer which is a children's book.
Robert began his acting career at age twelve on the stage.
Robert's real middle name is Lawrence.
Robert understudied three roles in Alberto Innaurato's Coming of Age in Soho at the New York Shakespeare Festival's Public Theatre
Robert received an Outer Critics Circle Award for Outstanding Featured Actor in a Play The Invention of Love (2001)
Robert's Astrological sign is Pisces.
Robert is 42 years old (since February 28 th)
In 1985 Robert appeared Off-Broadway in Sally's Gone, She Left Her Name (credited as Robert Leonard)
In 1997 Robert "revisited" Nazi era as a young Nazi officer, in Billy Hopkins' I Love You, I Love You Not
Robert's father's name is Robert Howard Leonard and his mother's name is Joy P. Leonard.
Robert has one brother called Sean Robert Leonard.
Robert's nickname is Bobby.
Robert dated Gwyneth Paltrow
Robert's middle name (Sean) was taken by him from his brother (it is his first name).
Robert was nominated for a Tony (Featured Role - Play) best actor in a in 2003 for a revival of Eugene O'Neill's Long Days Journey into Night.
Robert was nominated for a Tony (best actor in a Featured Role - Play) in 1993, for a revival of George Bernard Shaw's Candida.
Robert grew up on the same block as actor Casper Van Dien. They raced each other in go-carts.
Robert received the 2001 Tony award for best featured actor for his portrayal as A. E. Housman in Tom Stoppard's The Invention of Love.
Robert attended the Columbia University school of General Studies and Continuing Education.
Robert has a theatre company in New York called Malaparte he started the company with friends.
Robert is left handed.
Robert plays a young man, in the film Dead Poets Society, who eventually commits suicide because his father is forcing him to to study medicine and become a doctor. RSL later goes on to play the role of Dr. James Wilson a very talented doctor who is head of oncology.
Robert: I've achieved everything I wanted to do. When I was growing up, I wanted to be Kevin Kline, Sam Waterston. I grew up watching the Public Theater and Shakespeare in the park and Marion Seldes. I mean, I may as well be gay.
Robert: (On Wilson and House's relationship) I think they are like a complex, dark version of The Odd Couple's Felix and Oscar. For a guy like House to find the one person in the hospital who gets him, who shares his humor, who can be ironic as he is and is also in a lot pain, it's something everyone needs. But things shifted because of Tritter. The relationship got shaken up. But for me, this is the most fun I've had on the show. To have Hugh on one side and David on the other, that's a pretty nice line to be in.
Robert: Two of my favorite movies are The Misfits and All The President's Men. Man, there's a lot of testosterone in those two films. I pick Misfits because you rarely get to hear lines like when Marilyn Monroe asks Gable how they're going to get home and he answers: 'Just head for that big star straight on...It'll take us right home.' And President's Men because of when Hoffman lights up in an elevator and Redford says to him, 'Do you smoke everywhere?'