Wahlberg told MTV News that he has been impressed with Bieber as they have prepared to shoot their upcoming buddy basketball movie.
"It's set in [the world of] street hustling basketball... Obviously, [Bieber] is a very good athlete," the actor said, adding: "He can play. But I also really think he can act."
He continued: "There's not going to be any shortage of pushing him in getting that kind of strong performance out of him, if we get to make the movie.
"We're just going to have to make him realise that he's playing a character so he can't have the same hairdo."
Wahlberg also revealed that the as-yet-untitled project will feature him playing a mentor to Bieber's "wisecracking kid who's very talented".
The actor previously promised that the movie will be "worth the wait" it takes to fit the project into his and Bieber's schedules.