Haley Joel Osment is all grown up and menacing in the new "Entourage" movie, which he told ET was a dream come true.
"I remember when ["Entourage"] first came out it was huge with kids in my high school," Osment told ET. "It's just a really surreal experience to be a part of it in such a small way."
In the film, Osment plays Billy Bob Thornton's son, who stirs up trouble for Ari Gold (Jeremy Piven) -- a long way from his first job in a Pizza Hut commercial.
Haley Joel Osment
Haley Joel Osment is all grown up ... and playing a bad guy?
Haley Joel Osment hold up his ShoWest Supporting Actor of the Year award at the 27th Annual ShoWest Convention in Las Vegas on Thursday March 7, 2001. (Ap Photo/Jeff Klein)
NEW YORK, NY - NOVEMBER 11: Actor Haley Joel Osment attends Sony Pictures Classics screening of 'Foxcatcher' hosted by Details, Brooks Brothers & Patron with The Cinema Society at Museum of Modern Art on November 11, 2014 in New York City. (Photo by Monica Schipper/FilmMagic)
U.S. star Bruce Willis,left, poses together with eleven year old actor Haley Joel Osment, right, in front of a movie poster during a press conference about their film " The Sixth Sense" in Berlin Wednesday, December 8, 1999. The German premiere of the movie, directed by M. Night Shymalan, will be held this night in the German capital. (AP Photo/Markus Schreiber)
Frightened By His Paranormal Powers, 8-Year-Old Cole Sear (Haley Joel Osment) Is Too Young To Understand His Purpose In 'The Sixth Sense.' 1999 Spyglass Entertainment Group, Lp. All Rights Reserved. (Photo By Getty Images)
Actor Haley Joel Osment, who stars as David in the movie "A.I. Artificial Intelligence," arrives for the New York premiere of the film Tuesday, June 26, 2001. (AP Photo/Darla Khazei)
PASADENA, CA - JANUARY 09: Actor Haley Joel Osment speaks onstage during the 'The Spoils of Babylon' panel discussion at the Independent Film Channel portion of the 2014 Winter Television Critics Association tour at the Langham Hotel on January 9, 2014 in Pasadena, California. (Photo by Frederick M. Brown/Getty Images)
26th March 2000: American child actor Haley Joel Osment wears a tuxedo as he arrives at the Academy Awards ceremony, Shrine Auditorium, Los Angeles, California. He was nominated as Best Supporting Actor for his work in M. Night Shyamalan's film, 'The Sixth Sense.' (Photo by Paul Fenton/Fotos International/Getty Images)
Something Harrowing And Unexplainable Is Happening To 8-Year-Old Cole Sear (Haley Joel Osment, Left) Which His Mother Lynn (Toni Collette, Right) Is Unable To Comprehend, In Hollywood Pictures' And Spyglass Entertainment Group's Chilling Psychological Thriller, 'The Sixth Sense.' 1999 Spyglass Entertainment Gourp, Lp. All Rights Reserved. (Photo By Getty Images)
NEW YORK, NY - OCTOBER 27: Actor Haley Joel Osment speaks at AOL BUILD Series at AOL Studios In New York on October 27, 2014 in New York City. (Photo by Paul Zimmerman/Getty Images)
Haley Joel Osment, left, and Abby Elliott, right, attend the New York premiere of "Sex Ed" at AMC Empire 25 on Friday, Nov. 7, 2014, in New York. (Photo by Andy Kropa/Invision/AP)
American child actor Haley Joel Osment, circa 2000. He was nominated for an Academy Award for his role in the 1999 film 'The Sixth Sense'. (Photo by Maureen Donaldson/Getty Images)
1999 Haley Joel Osment And Bruce Willis Star In 'The Sixth Sense.' (Photo By Getty Images)
385327 04: Actor Haley Joel Osment of 'The Sixth Sense' arrives to a V.I.P. party on the eve of the public grand opening of ''Disney's California Adventure'' theme park, February 7, 2001 in Anaheim, CA. The 55-acre park next to Disneyland is based upon California themes of past and present. (Photo by David McNew/Newsmakers)
382325 01: Bruce Willis Stars As Child Psychologist Dr. Malcolm Crowe And Haley Joel Osment (L) Stars As Cole Sear Who Has A Dark Secret In 'The Sixth Sense.' (Photo By Getty Images)
Best suppporting actor nominee Haley Joel Osment arrives for the 72nd Annual Academy Awards at the Shrine Auditorium in Los Angeles, Sunday, March 26, 2000. Osment has been nominated for his role in "The Sixth Sense." (AP Photo/Damian Dovarganes)
Actors Bruce Willis, left, and Haley Joel Osment, right, starring in the film "Sixth Sense," are shown in a scene from the movie which was filmed in Philadelphia in this undated photo. (AP Photo/Copyright Spyglass)
380717 06: Haley Joel Osment (as Trevor McKinney) acts in a scene in the Warner Bros. Pictures and Bel-Air Entertainment's drama, 'Pay It Forward.' (Photo by David James/2000 Warner Bros. & Bel Air Pictures, LLC/Newsmakers)
WASHINGTON, DC - APRIL 25: Emily Osment and Haley Joel Osment attend the 101st Annual White House Correspondents' Association Dinner at the Washington Hilton on April 25, 2015 in Washington, DC. (Photo by Michael Loccisano/Getty Images)
LOS ANGELES, CA - FEBRUARY 08: Actor Haley Joel Osment attends the Warner Music Group annual Grammy celebration at Chateau Marmont on February 8, 2015 in Los Angeles, California. (Photo by Araya Diaz/Getty Images for Warner Music Group)
WASHINGTON, DC - APRIL 24: Actor Haley Joel Osment attends The Creative Coalition 2015 Benefit Dinner at STK Washington D.C. on April 24, 2015 in Washington, DC. (Photo by Mark Sagliocco/Getty Images)
NEW YORK, NY - NOVEMBER 11: Haley Joel Osment attends the after party for Sony Pictures Classics screening of 'Foxcatcher' hosted by Details, Brooks Brothers & Patron with The Cinema Society at The Standard Highline on November 11, 2014 in New York City. (Photo by Dimitrios Kambouris/Getty Images)
LOS ANGELES, CA - JANUARY 07: Actor Haley Joel Osment attends the screening of IFC's 'The Spoils Of Babylon' at DGA Theater on January 7, 2014 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
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"I was four years old," Osment remembered.
A year after landing that TV spot, Osment was playing Tom Hanks' son in "Forrest Gump." Five years later, Osment became a household name for his Oscar-nominated performance in "The Sixth Sense."
"A lot of kids can't make that transition to become adult actors," co-star Kevin Dillon said. "He's done it."
"He's just a fantastic actor," Adrian Grenier said. "When Hayley Joel got the part, I was like, 'That's it.'"
Osment gave us the key to his success and level-mindedness.
"I'm really lucky to have a life that isn't exclusively revolving around the business," he said.