Probably the best known example of shots with a double. This must have brought the house down the first time it was screened!
Scarlett Johansson also has a twin. But they haven’t been able to pull off any believable double scenes.
Yes, but did a hot dog make her lose control? 
In an episode of The Good Place entitled Janet(s), D’Arcy Carden played Janet playing every main character in the script. It was a tour de force.
Linda Hamilton has an identical twin too. She was in some shots with her sister in Terminator 2: Judgement Day.
Needscoffee referred to that.
Yep, see post 10. I didn’t name the twin thing though, as it was a spoiler.
Lol!!
I saw a live on stage play once where they did this!
It was called “Bullshot Crummond”, a parody of the detective series Bulldog Drummond, at a playhouse in San Francisco, circa 1975.
From the Wikipedia page:
ETA: The play has its own web site, with some pics:
http://www.lowmoan.com/bullshot/page1.html
Zowie! I just found there’s a YouTube of this scene, also showing the behind-the-scenes how they did it. (About 2 1/2 minutes long, relevant action starts at about 0:15)
Aaron Ashmore was in the science fiction TV series Warehouse 13, and they had every intention of one day having an episode where there would be two of him, so they could bring on his twin brother Shawn to play him. Turns out the week they shot that episode Shawn was unavailable, so they had to resort to VFX after all.
I haven’t found of a clip of it yet but IIRC the ST:TNG episode in which Riker discovers his transporter duplicate had a scene in which one walked around the other. I remember thinking at the time it was a well-done effect but that may be imperfect memory.
Something did. She had some upper arm fat. Or maybe she just didn’t get to the gym enough.
Orphan Black has probably the most extensive and advanced “twin” tech in recent memory. Here’s a behind the scenes on how they do it.
For The Social Network, in which Armie Hammer playing both of the Winklevi, they had a guy with the same build and hair color and style appear in scenes with him and, when both of their faces had to be seen at the same time, used CGI to “wrap” the head of the other guy with Armie’s face.
And Elizabeth Montgomery played both Samantha, and her cousin Serena
Now that CGI is here, that approach certainly seems simpler than the method in mikecurtis’ excellent video, involving elaborate camera-movement-replication technology. Just copy & paste somebody’s face onto someone else’s body.
(In Lord of the Rings, they used multiple practical effects to get the size differences between hobbits, dwarves and men – but in a few limited cases they had to impose a hobbit star’s face over a stand-in little person’s)
They did the twin trick twice in Terminator 2. Don and Dan Stanton, both actors, played the hospital security guard and the T-1000. Don played the guard, Dan played the T-1000.
Yeah - Orphan Black does the best job of this I’ve ever seen. I remember one scene where they had 4-5 of the same character dancing. The have them intentionally move around each other as to say, “See - no split screen.” I never really replayed and studied the scenes, but got the impression that one of the characters was the “main” one, which the others were added in around. They even have the characters hand things to each other. Really neat.
I’l shocked when I see relatively modern shows that do a lousy job of this - such as obviously filming a double from behind who doesn’t really resemble the principal.