Actor Jamie Foxx impersonates LeBron James

Oscar winner Jamie Foxx was at his comedic best when he gave an impromptu class on how to impersonate the king of basketball – LeBron James.

Foxx, who portrayed legendary musician Ray Charles and is set to play boxing's bad boy Mike Tyson in an upcoming movie, took on the role of acting coach when he met up with Sacramento Kings owner Vivek Ranadive.

Sticking with what the NBA franchise owner knows best, the 47-year-old Foxx took on the Kings' rival and arguably the world's greatest basketballer in James.

Starting with something simple, Foxx showed the millionaire businessman how the Cleveland Cavaliers' star's facial expressions all begin with the chin.

The actor then walked his student through one of James' signature moves – the 'LeBron James back-pedal because the play went bad'.

The class was a massive hit with onlookers breaking into hysterics with each lesson.

But it remains to be seen whether James will see the lighter side of Foxx's impersonations.