From Brangelina to Bogart and Bacall: the best on-screen chemistry

A sizzling spark between actors can elevate a film, as these amorous double acts show

This was the film that sparked a virtual supermarket tabloid-gossip industry. Brad Pitt and Angelina Jolie play an outwardly respectable married couple, each with a secret kept from the spouse: they are both professional assassins. Then each gets a commission to kill the other. The film is a bit silly, but you can see the dark and dangerous spark between the since-estranged Jolie-Pitts.