The warning signs are all there. The blonde hair. The topless torso. The charming smile grinning at you from every poster on the London Underground. Yes, a new Matthew McConaughey film is out in UK cinemas: Mud, directed by Jeff Nichols, the guy who made the superb Take Shelter.

Ever since the McConnaissance began a couple of years ago, the world has been introduced to something both wonderfully exciting and utterly baffling: the existence of good Matthew McConaughey films. Those impressed by the excellent actor's recent turns in Killer Joe or Magic Mike may well be tempted to catch up on his substantial career history. But as anyone who's seen How to Lose a Guy in 10 Days knows, it's a minefield out there - there are tons of bad McConaughey flicks and only a handful of great ones.

So, to help you in your dilemma of whether on not to see Mud (or any of his other films), we present you with our flowchart to answer that all-important question: am I watching a good Matthew McConaughey film?

Print this chart off for future use - then go and see Mud right away.

Still not convinced? Read our Mud review from the Sundance London Film Festival.