After parents' divorce, moved to L.A. with mother and younger brother Chad
While in high school, acted in Super 8 movies made by classmates Sean Penn and Charlie Sheen
Began acting in TV commercials
Made TV series debut on the short-lived ABC sitcom "A New Kind of Family"
Played the title role in the ABC Afterschool special "Schoolboy Father"
Acted in the CBS TV-movie "Thursday's Child"; earned a Golden Globe nomination for Best Supporting Actor in a TV movie
Landed breakthrough role as Sodapop in Francis Ford Coppola's "The Outsiders"
Played a wealthy prep-school student whose mother (Jacqueline Bisset) carries on an affair with his roommate (Andrew McCarthy) in "Class"
Featured opposite Jodie Foster and Nastassja Kinski in the film adaptation of John Irving's "The Hotel New Hampshire"
Played an American attending the famed British university in "Oxford Blues"
Featured alongside other twentysomething actors (including Demi Moore, Emilio Estevez and Andrew McCarthy) in "St. Elmo's Fire"
Landed starring roles in "Youngblood" (with "The Outsiders" co-star Patrick Swayze) and "About Last Night" (with "St. Elmo's Fire" co-star Demi Moore)
Earned critical praise for his performance as a mentally-challenged youth in "Square Dance"
Made stage debut at the Williamstown Theatre Festival in "Three Sisters"
Starred in the thriller "Masquerade" opposite Meg Tilly
Caught on videotape in a tryst with two women (one underage) at the Democratic National Convention in Atlanta
Made disastrous appearance on the 61st Academy Awards telecast performing a duet with an actress playing the part of Snow White
Had a villainous turn opposite James Spader in "Bad Influence"
Hosted "Saturday Night Live" (NBC), beginning his association with then-cast member Mike Myers
Made Broadway debut in "A Little Hotel on the Side"
Garnered praise for his featured role in Mike Myers' "Wayne's World"
Co-starred with Natasha Richardson and Maggie Smith in a small screen remake of "Suddenly Last Summer" (PBS)
Portrayed a deaf mute in the ABC miniseries version of "Stephen King's The Stand"
Produced the HBO-aired film "Frank and Jesse"; also co-starred as Jesse James
Had an uncredited cameo in "Tommy Boy," starring "SNL" cast members David Spade and Chris Farley
Wrote and directed the short film "Desert's Edge" (aired on the Showtime series "Directed By")
Portrayed a conservative Christian leader in "Contact"
Put his notable impersonation of Robert Wagner to good use with a featured role in Myers' "Austin Powers: The Spy Who Shagged Me"
Returned to series television for the first time since 1979, playing the President's deputy communications director on the NBC political drama, "The West Wing"; left the series due to monetary disputes; earned Golden Globe (1999, 2000) and Emmy (2001) nominations for Best Actor
Played a NYC detective tempted to corruption in the TNT original movie "Framed"
Had supporting role in "A View From the Top"
Starred and executive produced the short-lived NBC drama "The Lyon's Den"
Starred in the short-lived CBS drama "Dr. Vegas"; also produced
Re-teamed with Aaron Sorkin to star in the London revival of "A Few Good Men"
Reprised his role as Sam Seaborn, the senior political official for the final episodes of NBC's "The West Wing"
Co-starred with Aaron Eckhart in Jason Reitman's satirical comedy "Thank You for Smoking"
Cast on ABC's "Brothers & Sisters" as a Republican senator, Robert McCallister; left series after the fourth season
Joined the NBC comedy "Parks and Recreation" as a state employees brought in to fix Pawnee¿s budgetary crisis
Co-starred in Mark Pellington's "I Melt with You"