Trivia

Was a professional pilot for a year in the early 1980s.

Certified flight instructor, rated in single and multi-engine airplanes and helicopters.

Children: son Gill Williams (b. 1992) and daughter Elinor Williams (b. 1998).

The name Treat (his actual middle name) comes from one of his maternal relatives (though not a direct ancestor), Robert Treat Paine, whose signature appears on the Declaration of Independence. Through his mother, Treat is also the great-great-great-grandson of William Henry Barnum, a Democratic U.S. Senator from Connecticut, who served from 1876 to 1879.

Graduated from Kent School, the same high school that Ted Danson, Peter Farrelly, and Seth MacFarlane attended.

In 2003, completed two weeks of training to qualify for flying jet engine planes.

Graduated from Franklin & Marshall College in 1973.

Had a brief romance with Dana Delany.

Andy Brown, Williams's character on Everwood (2002), was ranked #43 in TV Guide's list of the "50 Greatest TV Dads of All Time" [20 June 2004 issue].

Williams's accolades included nominations for two Screen Actors Guild Awards, three Golden Globes, a primetime Emmy, two Satellite Awards, and an Independent Spirit Award.

In 2010, Williams authored the children's book 'Air Show!' The book was published by Disney-Hyperion. Inspired by Williams's experience in aviation, it documents an air show with text and illustrations.

As a teenager, he acted in both high school and local theater productions, and began to think seriously about an acting career during his first year of college. At one point while in college, he was performing in three college shows simultaneously: "a comedy, a Shakespeare, and a musical".

Was invited to join the Academy of Motion Picture Arts and Sciences (AMPAS) in June 2004.

Williams learned to scuba dive in 1982 along with then-girlfriend Dana Delany while they spent time on Martha's Vineyard. They both became PADI-certified divers.

Was born in Stamford, Connecticut. but moved to Rowayton, Connecticut, when he was three years old.

The February 16, 1983, edition of Variety, in the "Production in Italy" section, reports the film "Boogie Woogie" directed by Andrea Frezza, starring Ben Gazzara and Treat Williams, was to begin filming in Italy in March 1983. Lack of funding prohibited completion of the film.

Co-starred with James Franco in two unrelated 2010 releases based on true stories: 127 Hours and Howl.