Rap mogul SEAN 'P DIDDY' COMBS is set to take on another acting project - as blues musician ROBERT JOHNSON.

The movie, LOVE IN VAIN, will be shot on location in Mississippi from September (03).

Johnson, the so-called KING OF THE DELTA BLUES, is considered one of the most influential musicians of the 20th century - even though he died at age 27 and recorded only 29 songs, including CROSSROADS, I BELIEVE I'LL DUST MY BROOM and LOVE IN VAIN.

The movie will be Comb's third film, after having appeared in MADE and MONSTER'S BALL.