Casey has directed a documentary on his brother-in-law Joaquin Phoenix due to release in 2010.
Casey was among Who Magazine's 25 Most Beautiful for 2008.
His favorite restaurant for vegetarian food is Candle Cafe in New York City.
Among his favorite home-cooked vegetarian meals are Tofu salad sandwich, seitan fajitas, penne arrabiata with olives, and meatless sausage.
Casey almost had his left arm amputated when he was five. The surgery to repair the infected compound fracture took 12 hours.
Casey and brother Ben have matching identical tattoos of a Native American fraternity symbol on their right shoulder blades.
Affleck has been nominated for the Academy Award for Best Actor in a Supporting Role for his performance as the young outlaw Robert Ford in Andrew Dominik's western The Assassination of Jesse James by the Coward Robert Ford.
Casey's favorite color is hazel.
Casey is a supporter of Millenium Promise, an organization founded by Jeffrey Sachs working to end poverty and disease in Africa and around the world. Brad Pitt was the one who introduced him to the group.
If made to choose the books he'd like to do as a film, he lists "The Sirens of Titan" by Kurt Vonnegut, "The Crossing" by Cormac McCarthy and "A Heatbreaking Work of Staggering Genius" by Dave Eggers.
Casey has had several cats, a snake, a turtle, a guinea pig, and a dog when he was a boy.
Casey is a supporter of the animal rights movement, having done campaigns for PETA. He also supports Farm Sanctuary and GoVeg.com
Casey received a purchased work of Boston's acclaimed photographer Brian Carroll from his mom as a gift for the back-to-back premieres of his movies Gone, Baby, Gone and The Assassination of Jesse James by the Coward Robert Ford in 2007.
Casey majored in Physics, Astronomy, and Western Philosophy at Columbia University. While studying in college, he lived with his grandmother in Manhattan. He also attended George Washington University.
Casey co-wrote the screenplay for the film Gerry with Matt Damon in 2002. He was also editor for the film.
Aside from being an actor, Casey has also worked as an editor, writer, producer, and advisor.
Casey's father Tim has worked as an actor, janitor, drug counselor, auto mechanic, and bartender. His mom, Chris, has worked as a teacher. His parents are divorced. He is the youngest child.
Casey is 5'9" (1.75 m).
He admitted to being ashamed of two movies in his career: Drowning Mona and Soul Survivors.
Casey is of Scottish-Irish descent.
Casey married Summer Phoenix on June 3, 2006. They had their first child, Indiana, on May 31, 2004 in Amsterdam. Their second child, another son Atticus, was born on November 2007.
He is a vegan. He smokes.
Casey: You get to where you have had enough failures and you realize that you've got one brother. You are going to ruin the relationship by being competitive over who gets to be in a movie? Are you kidding me?
Casey: (on what he thinks about people who wear fur) Ignorant or, what's worse, loveless.
Casey: I love it: The push and pull, the constant renegotiating of morals, ethics, what to do, how to live. ... All of us stuck here together trying to sort it all out.
Casey: I love animals, but I love people, and I love people who have all kinds of beliefs.
Casey: I have a mumbling problem. A very lazy tongue. I do vocal exercises in the morning sometimes.
Casey: (reaction to 2008 nomination for Best Supporting Actor) I'm taking it all with a grain of salt because there are some really good performances this year and I think there's a bit of luck involved.
Casey: There's always something about a private investigator that I love - they're really cerebral and disconnected and they're such cool characters.
Casey: (on fatherhood and doing the movie "Gone, Baby, Gone") I think I was much more in touch with the emotions of the story than I would have been if I didn't have a kid. You know, it's just a parent's worst nightmare, the things that happen in this movie. It definitely influenced my part in the movie.
Casey: (on his brother Ben directing) I was really proud of him. I think he's kind of a natural-born leader. That quality turned out to be a huge asset. People kind of follow him, want to support him and do what he says.
Casey: L.A. is kind of like home to nobody, you know, city of many kind of a place so even though I live there, I never really feel like it's my home but Boston definitely feels like a home.
Casey: I have believed many things and then later discovered I was 100 percent wrong. That hasn't made me a nihilist or even lessened my conviction in certain areas, but it has made me less willing to isolate myself because of some judgment I make about someone else.
Casey: (on his family's support of his animal rights beliefs) My family would be supportive if I said I wanted to be a Martian, wear only banana skins, make love to ashtrays, and eat tree bark.
Casey: When people ask me why I don't eat meat or any other animal products, I say, "Because they're unhealthy, and they're the product of a violent and inhumane industry".
Casey: (on doing an Ocean's Thirteen) I think that's unlucky. It'll probably be "Ocean's 14." We'll skip right to "14" like an elevator.
Casey: I don't think journalists have much impression of me. I haven't really done all that many interviews, partly by choice, and partly because no one's been all that interested.