Peter began to act in high school and although he began college as a Pre-Med student at Gustavus Aldophus College in St. Peter, Minnesota, he graduated with a B.A. in English Literature. He then decided to pursue acting and received an M.F.A. from New York University, where he starred in productions of Macbeth, Uncle Vanya, and Arms and the Man.
Two months after graduation, Peter made his television debut as a regular on Carol Burnett's hit variety show, Carol and Company, followed by a stint on the hit series Cybill. He was previously best known for his role of "Casey McCall" on the critically acclaimed series, Sports Night.
Peter has been nominated for 2 Emmy? Awards, 2 Golden Globe? Awards, and 2 SAG Awards for his performance on Six Feet Under. He has received 2 SAG Awards as part of the Six Feet Under ensemble.
Peter was also seen starring opposite Naomi Watts and Mark Ruffalo in We Don't Live Here Anymore and made his Broadway debut starring in Arthur Miller's After The Fall for director Michael Mayer.
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