Black Mass is blowing our minds right now, and it’s not just because the movie boasts a star-studded cast (we’re talking Benedict Cumberbatch, Kevin Bacon, Dakota Johnson AND Sienna Miller, to name just four) who stepped out on the Venice Film Festival red carpet last weekend. Depp looked a lot more like his usual style-icon self in a black tux, while wife Amber Heard co-ordinated in a black Stella McCartney gown. Also out at the festival, Dakota Johnson rocked a '00s inspired Prada pastel pink slip dress to promote her turn as Lyndsey, Depp's on-screen girlfriend.

Johnny Depp and wife Amber Heard at the Venice Film FestivalDakota Johnson at the Venice Film Festival, promoting Black Mass

If you haven't already seen the trailer for the American crime drama, you seriously won't believe your eyes at the transformation Dakota and co underwent – Johnny Depp is utterly unrecognisable as Whitey Bulger, the real-life violent criminal turned FBI informant, stirring up South Boston in the early 1980s. Check out the Black Mass trailer above.

Johnny Depp plays Whitey Bulger, a violent criminal turned FBI informant

With short grey receding hair, we wouldn’t recognise Johnny in this outfit even if he offered to buy us a drink. While he’s used to appearing on Hollywood’s Hottest and best dressed lists year round, we’re not sure he’d make it into the top 100 with this ‘80s gangster get up. The decade might be a fashion hit right now, but that jacket should never make a comeback.

Johnny, you've been a bad boy...

Benedict Cumberbatch undergoes slightly less of a transformation to play Depp’s brother, William, a state senator put in a sticky situation after Whitey’s criminal activity. Think sharp suits, classic ties and a seriously slick side parting – very all American presidential campaign. Much to the delight of Cumberbitches everywhere, Benedict was brought in to replace Guy Pearce, who dropped out of the project due to ‘scheduling issues’. We’re happy to see Benedict is still playing the good guy – we don’t think we could take a nasty Sherlock.

Benedict Cumberbatch jumped in to replace Guy Pearce

Black Mass is actually based in the 2001 book Black Mass: The True Story of an Unholy Alliance Between The FBI and the Irish Mob (catchy title), so if you’re into your real-life crime drama, this film will be a treat. Mark your calendar for September and get set to see Jack Sparrow in a totally different way…