John Heard was born on March 7, 1946 in Washington, D.C.; he was the son of Helen (Sperling), who was involved in the arts and appeared in community theatre, and John Henry Heard, who worked for the office of the Secretary of Defense. Heard was raised as a Catholic. Heard attended Gonzaga College High School, Clark University in Worcester, Massachusetts, and Catholic University of America, in Washington, D.C. He grew up with two sisters, one of whom, Cordis, is also an actress, and a brother, Matthew, who died in 1975. In the 1970s, Heard appeared on the stage and in television and film. He appeared off-Broadway in 1974 in Mark Medoff's play The Wager and in 1975 as Guildenstern in HAMLET at the Delacorte Theatre in Central Park, where he also understudied Sam Waterston as Hamlet. That fall, the production moved to the Vivian Beaumont Theater at Lincoln Center. Heard appeared at the Eugene O'Neill Theater Center in 1977 in a series of new plays. Heard won Obie Awards for his performances in Othello and Split in 1979–80. He was the male lead in the 1979 film Head Over Heels (which was renamed and re-released as Chilly Scenes of Winter in 1982). In 1981, he had the starring role of Alex Cutter in the film Cutter's Way. In 1982, he played the lover of Nastassja Kinski, one of the main characters, in the remake of Cat People. He co-starred as photographer George Cooper in C.H.U.D. (Cannibalistic Humanoid Underground Dwellers, 1984) alongside future Home Alone co-star Daniel Stern and in The Trip to Bountiful (1985). In the comedy-drama film Heaven Help Us (aka, Catholic Boys, 1985), Heard played a monk named Brother Timothy. In After Hours (also 1985), Heard was bartender Tom Schorr. He was seen in the film The Milagro Beanfield War and had a significant role playing Paul, Tom Hanks's adult corporate competitor and jilted boyfriend of Elizabeth Perkins, in Big (both 1988). He co-starred with Bette Midler in Beaches (also 1988). In 1990 Heard starred in the philosophical film Mindwalk, in which three characters from different socialitical and poetical backgrounds express their opinions on the human experience, and around the same time, he was in Awakenings alongside Robert De Niro and Robin Williams. starred in Deceived (1991), with Goldie Hawn, playing Jack Saunders, and had a supporting role in Gladiator (1992), with Cuba Gooding Jr. He played Daugherty in the film Radio Flyer (1992) and FBI agent Gavin Vereek in The Pelican Brief (1993). He starred with Samuel L. Jackson in 1997's One Eight Seven and was featured in the 2000 miniseries Perfect Murder, Perfect Town.

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