Justin Bieber's basketball movie will be ''worth the wait''.

The 'Baby' singer is set to star in an as-yet-untitled picture alongside Mark Wahlberg, and although no script is yet in, Mark believes it will be a particularly good film.

He told MTV News: ''We're waiting for The Script. Waiting for the script. Every time I see Bieber or Scooter Braun, I have to explain to them that it's a bit of a process having the script written.

''It certainly has to be something that's good enough to go and have green-lit and make right away. But I think it will be well worth the wait.''

Mark previously said the movie would be in a similar vein to 'The Colour of Money', with Bieber playing a young up-and-coming sports star.

No schedule is yet known for when the film may be released.

Although it would be Justin's first feature, it would not be his debut in a movie theatre - he previously appeared in his own concert movie 'Never Say Never'.