Robert Sean Leonard has carved a distinguished career on stage and screen. He is a three-time Tony Award nominee and won the 2001 Tony Award for Best Featured Actor for his performance in The Invention of Love. In 2003, he was nominated in the same category for his performance in Long Day's Journey into Night, which also starred Brian Dennehy, Vanessa Redgrave and Philip Seymour Hoffman. He was most recently seen on stage in the 2011 Broadway revival of Born Yesterday.

Leonard's extensive theater credits include The Violet Hour, the Broadway productions of The Music Man; The Iceman Cometh with Kevin Spacey; Arcadia; Candida, for which he received a Tony nomination; The Speed of Darkness; Breaking the Code; and Brighton Beach Memoirs. He also appeared in the West End production of Our Town.

In 2001, Leonard starred in Richard Linklater's film Tape with Ethan Hawke and Uma Thurman, and was in the ensemble drama Chelsea Walls, directed by Hawke and based on the play  of the same name.

Born in New Jersey, Leonard began acting at age 14 at the Public Theater in New York. At 19, he made his film debut in the acclaimed Dead Poets Society starring opposite Robin Williams and Hawke. His film credits include Much Ado About Nothing, The Age of Innocence and Mr. & Mrs. Bridge.

While filming House, Leonard lives in Los Angeles with his wife, daughter and two dogs.

Hugh Laurie was born in Oxford, England, and educated at Eton College and Cambridge University, where he took a degree in anthropology. He rowed in the Cambridge and Oxford Boat Race of 1980 and was elected president of the venerable Footlights Revue. Along with Stephen Fry and Emma Thompson, Laurie produced The Cellar Tapes, which won the Perrier Award at the Edinburgh Festival Fringe of 1981 and propelled the trio into a number of groundbreaking British television shows, including four seasons of A Bit of Fry and Laurie, which Laurie co-wrote for the BBC with Stephen Fry; three seasons of Blackadder; and three seasons of "Saturday Live." In addition, four seasons of Jeeves and Wooster, based  on the novels of P.G. Wodehouse, aired on Masterpiece Theatre from   1990-1995.

On the big screen, Laurie's credits include the upcoming holiday animated release Arthur Christmas opposite James McAvoy and Jim Broadbent and the upcoming film The Oranges opposite Catherine Keener and Leighton Meester. He recently completed production in Papua New Guinea on the upcoming film Mister Pip.

Previous feature credits include the animated films Hop, opposite Russell Brand and James Marsden and Monsters vs. Aliens opposite Reese Witherspoon and Seth Rogen; Street Kings opposite Forest Whitaker and Keanu Reeves; Flight of the Phoenix opposite Dennis Quaid; Peter's Friends directed by and co-starring Kenneth Branagh; Sense and Sensibility with Emma Thompson and Kate Winslet; Cousin Bette with Jessica Lange; The Man in the Iron Mask; 101 Dalmatians; and the Stuart Little movies with Geena Davis.

On American television, Laurie portrayed Vincente Minnelli opposite Judy Davis in the network telefilm Life with Judy Garland: Me and My Shadows. He also appeared in Tracey Takes On... and Friends. His voiceover credits include Family Guy and The Simpsons episode.

Laurie has directed television programs and commercials, including the HOUSE Season Six episode "Lockdown," composed and recorded numerous original songs and written articles for London's The Daily Telegraph newspaper. Four volumes of "A Bit of Fry and Laurie" scripts have been published by Mandarin, and his first novel "The Gun Seller" was published in both the U.K. and the U.S. to critical acclaim and has been adapted into a screenplay.

Laurie's performance as "Dr. Gregory House" has garnered him two Golden Globe Awards for Best Performance by an Actor in a Television Series, six Emmy nominations for Outstanding Lead Actor in a Drama Series and two Screen Actors Guild Awards for Outstanding Performance by a Male Actor in a Drama Series. He has twice been honored by the Television Critics Association with TCA Awards for Individual Achievement in Drama.

After signing a record deal with Warner Bros. records, Laurie recorded the New Orleans blues album Let Them Talk which has been released in the U.S. and internationally. Recorded at sessions in Los Angeles and New Orleans, the musical and vocal collaboration is produced by two-time Grammy Award winner Joe Henry.

Laurie is a spokesperson for L'Oreal Paris Men.

While filming House, Laurie lives in Los Angeles.