KEY POINTS:
Natalie Portman and Hayden Christensen have been voted the movie couple with the most unconvincing on-screen chemistry.
Their romance in Star Wars: Episode II - Attack of the Clones, tops a poll which also features pairings like Kate Beckinsale and Ben Affleck. Affleck appears twice in the poll - in second place with Jennifer Lopez for the flop Gigli.
Britons Keira Knightley and Orlando Bloom came in third for pairing up in Pirates of the Caribbean and Madonna and Italian actor Adriano Giannini came in fourth for Swept Away.
The age difference between Catherine Zeta Jones and Sir Sean Connery meant their roles in Entrapment failed to inspire audiences, hitting fifth place in the poll.
Hugh Grant and US star Andie MacDowell are sixth for Four Weddings and a Funeral, while Affleck also takes seventh place with Kate Beckinsale in Pearl Harbor.
Despite being married at the time, couple Tom Cruise and Nicole Kidman could not generate much heat in the Kubrick film Eyes Wide Shut, coming in at eighth.
Heath Ledger and Jake Gyllenhaal were ninth for their part as gay lovers in the cowboy film Brokeback Mountain with Titanic stars Leonardo DiCaprio and Kate Winslet rounding out the top ten.
