Johnny Depp has missed out on the chance to star alongside ROLLING STONE Keith Richards, because the rocker's schedule is too busy.

The CHARLIE AND THE CHOCOLATE FACTORY star had been looking forward to Richards making a cameo appearance as his dad in 2006's Pirates Of The Caribbean: DEAD MAN'S CHEST.

But now the legendary guitarist, who was the inspiration behind Depp's alter-ego Jack Sparrow, is too busy with his band's world tour to take time out for acting.

Depp says, " It doesn't look like it will happen now. Keith is on tour so it's hard to fit into the timeframe we're working to."