Jon and Dan Hedder
The Napoleon Dynamite actor has a twin brother who is actually a part of his production company.
Shawn and Aaron Ashmore
Here are two well known actors from X-Men and Smallville, but not many people know that they are actually twins!
Kiefer and Rachel Sutherland
Kiefer's twin sister is also in the film industry, but she likes to focus on the production process instead of acting like Kiefer.
Nicholas Brendon and Kelly Donovan
Nicholas is well known as being in the series "Buffy the Vampire Slayer" and his twin brother was actually used as a stand in for him quite frequently in the show. Just not many people ever recognized him.