Dark Knight actor Heath Ledger final work as a music video director has been released on the web.

The actor, who died at the age of 29, had shot a promo for a rapper friend, No Fixed Abode, shortly before his death from an accidental prescription drugs overdose last year, reported Contactmusic.

Ledger filmed the footage for track 'Cause An Effect' with a single camera in a garage at his Sydney, Australia home.

'No Fixed Abode', also known N'FA, is glad his childhood pal agreed to do the job, insisting that the star was "happy" with his creation.

"The idea was to keep it very artistic which is what we did. Heath directed really well and I know that Heath was happy with the work. Every day I count my blessings that I got to have him direct this piece of art," said the rapper. The actor previously directed videos for singer- songwriter Ben Drake and rockers Modest Mouse.