Irons played identical twin gynaecologists in the dark, twisted David Cronenberg thriller adapted from Bari Wood and Jack Geasland's book Twins - and even he wasn't sure he wanted to be attached to the film.
Director Cronenberg flew to Britain to convince Irons to take the role a decade after he started casting.
He tells The Hollywood Reporter, "It was a tough sell. I literally went to 30 of the best American and Canadian actors... and they all said no.
Continue reading: Irons Signed Up For Dead Ringers After 30 Stars Said No
The Brit plays both Saddam Hussein's evil son Uday and his body double in the drama, and reveals he watched Jeremy Irons and Sam Rockwell portray multiple characters in a single film before his shoot.
And Cooper admits he "relished" playing dual leads - because it meant he was a permanent fixture on set.
He tells Britain's Esquire magazine, "I knew it would be hard (to play two characters), but I loved feeling part of it all. You can feel a bit removed on a film set, coming in to do your scene for one day, three days. You're a warm prop, really, which is why I relished doing this so much.
Continue reading: Dominic Cooper Studied Dual Roles For Devil's Double Inspiration
In the cult film Jeremy Irons played sinister twin gynaecologists BEVERLY and ELLIOT MANTLE.
Cronenberg will write and direct the pilot episode for US cable network HBO.
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