- Justin enjoys playing and watching several sports, which include basketball (favorite basketball team: Los Angeles Lakers), hockey (favorite team: The L.A. Kings) and football (favorite team: San Francisco 49ers).
- Justin's favorite shows are The Tom Green Show, WWE SmackDown! and Blind Date.
- Justin's favorite music bands at the moment are Dr. Dre and Eminem.
- His favorite episode of Malcolm in the Middle, the series that he stars, is "Waterpark", from the first season of the show.
- He played a part in the charity Jimmy Stewart Marathon.
- His first kiss was in a swimming pool when he was five years old.
- His favorite movies are American Pie, Deuce Bigalo Male Gigalo, and Austin Powers 2.
- His favorite wrestler is The Rock.
- His favorite actors are Adam Sandler and Jim Carrey.
- His favorite foods are sushi, pizza, and In-N-Out Burger.
- Gail Stark is his mother's birth name.
- Justin's religion is Jewish.
- Filmography as an actor:
Who's Your Daddy? as "Danny Hughes"
Mom, Can I Keep Her? as "Timmy Blair"
Wanted as "Flip"
Max Keeble's Big Move as "Caption Writer"
The Kid with X-Ray Eyes as "Bobby Taylor"
Invisible Mom II as "Eddie Brown"
- He has had four dogs, two cats, six chickens, a pig, and fourteen desert tortoises. His family has had rats, snakes and tarantulas in the past.
- Justin was in a Discover Card commercial for Universal Studios.
- His favorite radio station is 102.7 KIIS FM.
- Justin's favorite ride is "Goliath" at Six Flags Magic Mountain.
- Justin has a crush on celebrity, Jennifer Love Hewitt. She is also his favorite actress and he likes her acting over her body.
- Justin Berfield has been interviewed on FOX News.
- Justin's favorite genre of movies are Sci-Fi.
- Justin threw out an opening pitch at the Texas Rangers vs. New York Yankees baseball game on May 22nd, 2004.
- Justin is a third-degree red belt in Tang Soo Do karate.
- His first acting job was in a commercial for Folger's coffee.
- Justin is 5'9"
- Justin Berfield got a special thanks in the movie 3 Ninjas.
- He was in the Young Hollywood Awards in 2003 as himself.
- Justin was himself in The Sharon Osbourne Show.
- Justin was in Ultimate Toy Awards 2004 as the presenter.
- Justin was in The 7th Annual Family Television Awards as himself.
- Justin was the executive producer of Filthy Rich: Cattle Drive a television series that was released in 2005.
- Justin was the co-producer of Romance & Cigarettes which was released in 2005.
- Justin is a producer for the Untitled Doris Payne Project which is scheduled for a 2007 release.
- Justin was in shows to aid the children who suffered from Hurricane Katrina.
- Justin enjoys golfing, scuba diving, fishing, spending time with his friends and family, traveling, and real estate investing.
- Justin is best known for his role as "Reese" in Malcolm in the Middle
- Justin was the youngest actor in the history who filmed more than 100 episodes for a TV series.
- Justin is also known as The Commercial Kid.
- Justin bought a house in Dallas, Texas.
- Curiously, he was born on the same day as James Phelps and Oliver Phelps from the Harry Potter series.
- Justin owns the production company J2 TV which he found with his partner Jason Felts.
- Justin knows Pat Benatar's daughter, Haley Egeana Giraldo since his childhood.
- Justin's father is Rick Berfield.
- His mother is Gail Berfield.
- Even if his character "Reese" is older than Frankie Muniz's character "Malcolm" in the series Malcolm in the Middle, Muniz is older than Justin in the real life.
- Justin donated $10,000 in the world's children day.
- Justin was the "National Youth Ambassador" for the Ronald McDonald House charity.
- Justin has a dog called Breed. He's a boxer.
- Justin has a dog called Diva.
- Justin owns a black BMW X5.
- Justin owns a silver Mercedes Benz C320 sedan.
- Justin's has a brother called Lorne Berfield.
- He made an audition for the role of "Anakin Skywalker" in Star Wars: Episode I - The Phantom Menace, but the directors didn't like him and he didn't get the role.
- Justin bought Nick Lachey and Jessica Simpson's old house outside of Los Angeles.
- Justin has been acting since he was 5 years old.
- Justin: L.A. can be intense but the second you get over the hill into Calabasas, your stress level immediately drops because it's so peaceful and safe. Sometimes I really miss it.
- Justin: On the set I'm really quiet. Instead of chatting it up between takes I'm always watching and listening. The wheels are spinning in my head all the time.
- Justin: Friends can come and go but your dogs stay with you their entire life.
