Although Fox Mulder may think she was sent to be his sidekick, she was actually assigned to keep an eye on him
(Hi, I'm Tia & Tamara Mowry.) Patty Duke played identical cousins on "The Patty Duke Show" & Sheryl Lee did it on this appropriately named series
On this NBC soap, Eileen Davidson as Kristen got look-alike Susan to have a baby for her
These former "Full House" twins have their own line of home video mystery adventures
Name shared by Phoebe's twin (also played by Lisa Kudrow) & George of the Jungle's wife, possibly a twin
He played Michael Knight's evil look-alike enemy Garthe on "Knight Rider"
Laurie Metcalf, who played Jackie on this sitcom, appeared as the landlady in "Leaving Las Vegas"
This creator of "Jeopardy!" appeared in the 1954 3-D horror film "Phantom Of The Rue Morgue"
He was playing Opie on TV when he played Eddie in the 1963 film "The Courtship Of Eddie's Father"
She already had her own talk show when she played Kathleen Turner's daughter in "Serial Mom"