Occasionally replaced brother Glenn as Mike Bauer on CBS daytime drama "The Guiding Light"
Made Broadway debut in "J.B." (billed as Ronnie Walken)
Worked for the summer as an assistant lion tamer with the Tarryl Jacobs Circus
Cast in the chorus of "Baker Street"; first role billed as 'Christopher' Walken
Film debut, a bit part in "Me and My Brother"
Had first significant feature role in "The Anderson Tapes"
First film in a lead role, "The Happiness Cage"
Played "Macbeth" at the NYSF's Public Theatre
Starred in the stage play "Kid Champion"
Portrayed Chance Wayne to Irene Worth's Alexandra del Largo in Tennessee Williams' "Sweet Bird of Youth"
Danced for the first time in a feature in James Ivory's "Roseland"
Won an Oscar for his memorable turn as a soldier serving in Vietnam in Michael Cimino's "The Deer Hunter"
Re-teamed with Cimino for the controversial "Heaven's Gate"
Displayed his dancing abilities to great effect as the oily villain in "Pennies From Heaven"
Co-starred in David Rabe's play about Hollywood "Hurlyburly"
Played Stanley Kowalski in "A Streetcar Named Desire" at the Williamstown Theatre Festival
Cast as the father with a criminal past in the downbeat but well-acted "At Close Range," co-starring Sean Penn and Chris Penn
Played the nemesis sergeant to a wisecracking new recruit in the film adaptation of Neil Simon's "Biloxi Blues"
Had title role in NYSF's production of "Coriolanus"
Portrayed real-life author Whitley Streiber, who claimed to have had encounters with aliens in "Communion"
First of several films with director Abel Ferrara, "The King of New York"
Appeared as the department store owner Max Schreck in "Batman Returns"
Co-starred in Quentin Tarantino's "Pulp Fiction"; delivered a memorable monologue about a gold watch
Debut as playwright (also starred) with one-man, off-Broadway production "Him"
Starred as the eldest of three brothers in a crime family in Ferrara's "The Funeral"
Offered a wildly over-the-top cameo as an exterminator in the comedy "Mouse Hunt"
Reprised role of Gabriel in the sequel "Prophecy II: Ashtown"
Voiced the character of Cutter in the animated "Antz"
Offered an over-the-top comedic performance as an effete turn-of-the-century drama critic in John Turturro's "Illuminata"
Returned to the NYC stage for the musical "James Joyce's The Dead"; received Tony nomination as Actor in a Musical
Made third telefilm with Glenn Close, "Sarah, Plain and Tall: Winter's End" (CBS)
Played an ex-con who gets embroiled in a robbery scheme in "The Opportunists"
Danced in the popular Fatboy Slim music video "Weapon of Choice"
Returned to the stage in the Mike Nichols-directed "The Seagull"; presented by the New York Shakespeare Festival in Central Park
Appeared as a mesmerist in the period drama "Affair of the Necklace"
Portrayed Marcus Porcius Cato in the TNT miniseries "Julius Caesar"
Cast in the remake of ''The Stepford Wives,'' Bryan Forbes' 1975 cult classic about upper-crust women being replaced by robots with sunny dispositions
Starred opposite Jack Black and Ben Stiller in the comedy "Envy"; directed by Barry Levinson
Cast opposite James Gandolfini, Susan Sarandon, and Kate Winslet in "Romance & Cigarettes," helmed by John Turturro
Portrayed a reality TV producer in "Domino" opposite Keira Knightley as Domino Harvey, a model-turned-bounty hunter
Cast opposite Adam Sandler in the comedy "Click," directed by Frank Coraci
Cast opposite Robin Williams in Barry Levinson's political comedy "Man of the Year"
Acted in the remake of John Water's "Hairspray" as Edna Turnblad¿s (John Travolta) husband Wilbur
Returned to Broadway in the black comedy "A Behanding in Spokane"; earned Tony Award nomination for Leading Actor in a Play
Cast in ensemble crime comedy "Seven Psychopaths"
Co-starred with Al Pacino and Alan Arkin as aging con men in crime comedy "Stand Up Guys"