Separated at Birth

Five sets of lookalike actors / actresses. I might have chosen some unconvincing pictures to showcase here, you can try google their names and judge it for yourself if you think they really are long-lost siblings.

Chris O'Donnell (left) and Stephen Amell (right). Chris O'Donnell is currently starring in NCIS: Los Angeles while Stephen Amell is currently starring as the title character in Arrow.

Lena Headey (left) and Keira Knightley (right). Lena Headey is the cunning queen in Game of Thrones and will be seen in the upcoming 300: Rise of an Empire. Keira Knightley has been laying low in 2013 but will be seen this week in Jack Ryan: Shadow Hunter.

Peter Sarsgaard (left) and Paul Rudd (right). Peter Sarsgaard has mostly been in supporting roles, most recently in Blue Jasmine. Paul Rudd is a regular in Judd Apatow movies, and was recently announced as the lead character in the upcoming Ant-Man.

Seth Meyers (left) and B.J. Novak (right). Seth Meyers is not well-known in this region unless you're familiar with Saturday Night Live. B.B. Novak was in The Office and was recently seen in Saving Mr. Banks.

Alyssa Milano (left) and Roxanne McKee (right). Alyssa Milano has not been very active post-Charmed. Roxanne McKee is not a well-known name but is currently featured in The Legend of Hercules as Hercules's mother which I kept thinking she was Alyssa Milano throughout the whole movie until the credit rolled.