Haley Joel Osment's young fans love talking to him about the 'Kingdom Hearts' franchise.

Haley Joel Osment

Haley Joel Osment

The 29-year-old actor has appeared in some major productions during his career, including a small role in the award-winning movie 'Forest Gump', but Haley has admitted he may be better known among the younger generation for his voiceover work on the video game.

He said: "There was this great moment when I did [John Logan's play] 'Red' and we had a student field-trip performance. It was all sixth and seventh graders in the audience, and they did a Q&A afterwards.

"The play's about Mark Rothko and painting, and every question was a variation of, 'When is 'Kingdom Hearts 3' coming out?' I was like, 'Wow, this game is really persistently popular!'"

Asked how he secured the role, Haley told Variety: "We first did it in 2001. I think they just offered it to me, and now we've done like eight various ones. I played the first two and then when I got to college, there was one year where I played a lot of Halo, and I was like, 'I should not make this a habit.'"

And the actor suggested there's more to his role than may be immediately apparent.

He shared: "We did 'Kingdom Hearts 2' in 2005, and I think it's a 120-hour game.

"We did sessions for many months, and the first time I went in there, the Japanese producers brought in this big vision board with four timelines: 'Your character goes in a portal back to the past, and there's this other planet' ... very complicated stuff."