- Graduated the University of Southern California School of Theatre.
- Her childhood interest in movies grew out of a lifelong battle with insomnia.
- Sister of Page Hannah.
- Step-niece of Haskell Wexler & Yale Wexler
- Listed as one of twelve "Promising New Actors of 1984" in John Willis' Screen World, Vol. 36. 
- Chosen by Empire magazine as one of the 100 Sexiest Stars in film history (#96). 
- Is missing part of her left hand index finger. She sometimes uses a prosthetic finger in movies.
- Played The Girl in a London stage production of The Seven Year Itch (1955) - a role made famous by Marilyn Monroe. [August 18, 2000]
- As a child Daryl was so shy that at one point she was diagnosed as borderline autistic. Even today she says she likes to just sit in a corner & observe people.
- Was in a serious relationship with John Kennedy Jr. for several years, but never married due to Jacqueline Kennedy's disapproval of her son marrying an actress.
- Made McCall's "10 Best Female Bodies In America" list in 1984.
- Since there was no girls' soccer team at Francis W. Parker School in Chicago, she played on the boys' team.
- She had brief yet interesting career in music. She sang background vocals on the hit 1985 single "You're a Friend of Mine," a duet by Clarence Clemons and her then-boyfriend Jackson Browne. She is also credited as contributing to the all-star chorus of the anti-apartheid album "Sun City: Artists United Against Apartheid," organized by Steve Van Zandt, also in 1985.
- Suffers from agoraphobia (fear of open spaces), a phobia she kept secret for many years, fearing it might ruin her acting career
- Half sister of Tanya Wexler.
- Sister of Don Hannah.
- Measurements: 34B-24-35 (Source: Celebrity Sleuth magazine)
- Sister-in-law of Lou Adler.
- Is a vegan.
- Born on the same day as actress Julianne Moore. She also shares a birthday with actor Brendan Fraser.
- On two occasions has run after and captured muggers in New York City. She says that both men's faces displayed mixed emotions when they realized who was sitting on their chests, holding them for police.
- Stepdaughter of Jerrold Wexler
- Good friends with John Corbett
- Is portrayed by Tara Chocol in America's Prince: The John F. Kennedy Jr. Story (2003) (TV)
- She attended the 2005 Gumball 3000 car race with Tina Basich. They drove a pink Range Rover Hybrid that used biodiesel made from cooking oil as fuel.
- She is often cast as the girlfriend of a considerably older man (Rutger Hauer, Robert Redford, Steve Martin, Michael Douglas [an ex-boyfriend], Alan Alda, Chevy Chase, David Carradine) or one who is older by a few years (Tom Hanks, Mickey Rourke, Peter Gallagher, Aidan Quinn).
- Lives in Colorado.
- As a keen environmentalist, Daryl lives off of solar power and drives a car that runs off of recycled fast food grease.
- She turned down the role of Vivian in Pretty Woman (1990) because she felt it was denigrating to women. She appeared in Dancing at the Blue Iguana (2000) as a stripper.
- 13 June 2006 - Was forcibly removed from a walnut tree on a South Central Los Angeles Community farm where she had stayed for 23 days to protest the sale of the farm to developers. Forty other protesters were arrested at the same time. Fellow activist Joan Baez also participated in the protest.
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