William Daniels is an American actor recognized for his significant contributions to television. He achieved critical acclaim for his role as Dr. Mark Craig in the medical drama "St. Elsewhere," winning two Primetime Emmy Awards. Daniels also lent his voice to the iconic talking car KITT in the action series "Knight Rider." He further cemented his fame with his role as the wise teacher Mr. George Feeny in the sitcom "Boy Meets World," receiving four People's Choice Award nominations. Daniels reprised both roles in later sequels, demonstrating the lasting impact of his performances.
On March 31, 1927, William David Daniels was born. He is an American actor known for roles such as Mark Craig in St. Elsewhere, KITT in Knight Rider, and George Feeny in Boy Meets World.
In 1943, William Daniels made his television debut as part of a variety act on NBC in New York, and his Broadway debut in Life with Father.
In 1949, William Daniels graduated from Northwestern University, where he was a member of Sigma Nu fraternity.
On June 30, 1951, William Daniels married actress Bonnie Bartlett.
In 1952, William Daniels made his first network television appearance portraying John Quincy Adams in A Woman for the Ages.
In 1960, William Daniels received an Obie Award for his performance in The Zoo Story.
In 1961, Bonnie Bartlett gave birth to a son, who died 24 hours later.
In 1963, William Daniels made his motion picture debut as a school principal in the anti-war drama film Ladybug Ladybug.
In 1965, Alfred Lunt and Lynn Fontanne won Emmy Awards for a production of The Magnificent Yankee for the Hallmark Hall of Fame, becoming the first married couple to accomplish the feat since.
In 1965, William Daniels reprised his Broadway role as a child welfare worker in the screen version of A Thousand Clowns.
In 1967, William Daniels appeared in The Graduate as the father of Dustin Hoffman's character.
In 1967, William Daniels starred as Carter Nash in the superhero sitcom Captain Nice.
In 1969, William Daniels refused the Tony Award nomination for Featured Actor in a Musical in 1776 due to his insistence that the part of John Adams was a leading role.
In 1969, William Daniels starred as John Adams in the Broadway musical 1776.
In 1972, William Daniels appeared in the film version of 1776, reprising his role as John Adams.
In 1976, William Daniels reprised the role of John Quincy Adams in the PBS miniseries The Adams Chronicles.
In 1978, William Daniels reprised his role as John Adams in the film The Bastard.
In 1979, William Daniels reprised his role as John Adams in the film The Rebels.
In 1982, William Daniels began his role as Dr. Mark Craig in St. Elsewhere and as the voice of KITT in Knight Rider.
From 1983, William Daniels' work on St. Elsewhere earned him his first of five consecutive nominations for the Primetime Emmy Award for Outstanding Lead Actor in a Drama Series.
In 1985, William Daniels won his first Primetime Emmy Award for Outstanding Lead Actor in a Drama Series for his work on St. Elsewhere.
In 1986, William Daniels won his second Primetime Emmy Award for Outstanding Lead Actor in a Drama Series for his work on St. Elsewhere.
In 1986, William Daniels's role as the voice of KITT in Knight Rider ended.
By 1987, William Daniels' work on St. Elsewhere earned him his last of five consecutive nominations for the Primetime Emmy Award for Outstanding Lead Actor in a Drama Series.
In 1988, William Daniels's role in St. Elsewhere concluded.
In 1991, William Daniels reprised his voice-only role of KITT for the television movie Knight Rider 2000.
In 1993, William Daniels began portraying George Feeny in Boy Meets World.
In 1999, William Daniels became the president of the Screen Actors Guild.
In 2000, William Daniels reprised his role as the voice of KITT in the sequel TV movie Knight Rider 2000.
In 2000, William Daniels reprised his voice-only role of KITT in the theatrical comedy movie The Benchwarmers.
In 2000, William Daniels's role as George Feeny in Boy Meets World concluded.
In 2000, as president of the Screen Actors Guild, William Daniels led the union's efforts during the commercial actors strike.
In 2001, William Daniels's term as president of the Screen Actors Guild ended.
In 2012, William Daniels appeared in the ninth season of Grey's Anatomy as Dr. Craig Thomas.
In 2014, William Daniels reprised his role as Mr. Feeny in the pilot episode of the Boy Meets World spinoff, Girl Meets World.
In 2015, William Daniels reprised the role of KITT in the Lego-themed action-adventure video game Lego Dimensions.
In early 2023, William Daniels completed filming the role of King Henry VI in the upcoming "Richard III".
On October 14, 2025, at 98 years old, William Daniels appeared as a surprise guest on Dancing with the Stars.
As of January 2026, William Daniels and Bonnie Bartlett's marriage is the longest active Hollywood marriage, at 74 years.
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