'X-Men Origins: Wolverine' leaks online

A workprint of X-Men Origins: Wolverine has allegedly leaked online.

Pirated copies of the superhero prequel have surfaced across torrent websites a month before the movie is due for release in theatres.

The bootleg is purportedly a DVD quality video of the 20th Century Fox blockbuster without a timecode or studio watermark, but with several visual effects shots unfinished.

X-Men Origins: Wolverine, directed by Gavin Hood, sees Hugh Jackman return to the role of the adamantium-clawed mutant. The movie centres on the eponymous anti-hero's quest for revenge after his girlfriend is murdered by Victor Creed (Liev Schreiber).

Wolverine will arrive in UK cinemas on April 29.