Sly Stallone to retire from acting

Sylvester Stallone is set to retire from acting as he believes it's time for new challenges.

The 63-year-old actor - best known for his roles as boxer Rocky Balboa in the 'Rocky' movie series and troubled soldier John Rambo from the 'Rambo' franchise - says his new movie 'The Expendables' could be his last as the time is right for him to move on.