Need more double vision?
Twin shenanigans make for good entertainment, but what are you going to do -- hire the increasingly puffy Jeremy and Jason London every time you need a twinset?
Armie Hammer plays both the Winklevoss duo in "The Social Network." Here's an ode to five more movies whose actors did onscreen double duty.
Sam Rockwell, trapped on a space station with Sam Rockwell, discovering secret storage caches of nothing but Sam Rockwells.
Choose your own Nicolas Cage -- the irritating one who scores women but has Brillo hair, or the irritating one who has Brillo hair and social incompetence.
"The Parent Trap," 1998
This movie makes us nostalgic for the time when Lindsay Lohan's most pressing problem was a bad British accent. The 1961 version starred two Hayley Millses and one adorable dance routine.
"Dead Ringers," 1988
Because sometimes one creepy gynecologist is not enough, Jeremy Irons offers up two Hippocratic oath-flouting docs.
"Big Business," 1988
Bette Midler, Bette Midler, Lily Tomlin, Lily Tomlin. Supertwins! Also: multiple gingham dresses.
-- Monica Hesse