- Attended the Piven Theatre Workshop as a child and befriended the founders' son, actor Jeremy Piven. The two went on to appear in numerous films together, including 1989's Say Anything, 2001's Serendipity and 2003's Runaway Jury.
- Voiced radio commercials for McDonald's and Heinz at age 12.
- At age 16, he made his feature-film debut in the teen comedy Class (1983).
- Cowrote, coproduced and costarred in 1997's Grosse Pointe Blank, the first film released by New Crime Productions, a company he cofounded in 1992.
- Has a sixth-degree black belt in Ukidokan kickboxing.
- Board member of the Schoolhouse Foundation, a nonprofit group in New York City.
- 2000, Independent Spirit Awards — Best Male Lead: Nominee
- 2013, Screen Actors Guild Awards — Outstanding Performance by a Cast in a Motion Picture: Nominee
- 2001, BAFTA Film Awards — Best Adapted Screenplay: Nominee
- 2001, Golden Globe — Best Performance by an Actor in a Motion Picture - Musical or Comedy: Nominee
- 2015, Canadian Screen Awards — Performance by an Actor in a Supporting Role: Winner
- 2001, Writers Guild Awards — Adapted Screenplay: Nominee
- 1999, Screen Actors Guild Awards — Outstanding Performance by a Cast in a Motion Picture: Nominee
- Neve Campbell — Ex-significant Other
- Nancy Cusack — Mother
- Jodi Lyn O'Keefe — Ex-significant Other
- Joan Cusack — Sister
- Richard Cusack — Father
- Bill Cusack — Brother
- Ann Cusack — Sister
- Susie Cusack — Sister
- Attended New York University, New York, New York, United States
- Birth Name: John Paul Cusack
- Birth Place: Evanston, Illinois, United States
- Profession: Actor, Producer, Screenwriter, Director
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