'Happy Feet 2' suffering from delays

George Miller's long-awaited sequel to the 2006 sleeper hit animation Happy Feet has reportedly been hit with delays.

According to a tweet picked up by Moviehole, the film's production company Funny Az Hell Animation are struggling with the workload and need more staff to complete the project.

"Happy Feet 2 experiencing delays, need to outsource", managing director Stuart Cunningham tweeted. "If you can take a load, contact Dr. D."

It was reported in January last year that both Matt Damon and Brad Pitt had been tapped to provide two small voice parts in the film.

Happy Feet 2 is the second project from director George Miller to experience delays recently, after production on his Mad Max film starring British actor Tom Hardy was pushed back until 2012.

Happy Feet 2 is still currently scheduled for release on November 18.