famous families Celebrities You Might Not Know Are Siblings  

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This is a list of celebrities that you didn't know were siblings, loosely ranked by fame and popularity. Everyone knows that John and Joan Cusack are siblings. They look alike, they share a last name, and they have appeared in several movies together. However, some famous siblings aren't so easy to spot. This list shows some celebrity siblings that have changed their names, leaving them to have no apparent connection other than DNA.

Who are the most famous pair of celebrities that you didn't know were siblings? Charlie Sheen and Emilio Estevez top our list. Both brothers were born with the last name Estevez, but Charlie decided to adopt their father, Martin Sheen's, stage name. They have appeared together in the film Men at Work, and Estevez did a guest spot on Sheen's television show “Two and a Half Men.”

Also on this list are famous siblings who work in different industries, making it difficult to pair them together. Pop singer Lily Allen has hit songs like “Smile” and “Womanize,r” while her brother Alfie Allen has been scheming for power as Theon Greyjoy on the HBO show “Game of Thrones.”

Are you surprised that these famous folks are siblings? Share your thoughts in the comments section.

Warren Beatty is listed (or ranked) 1 on the list Celebrities You Might Not Know Are Siblings
Photo:  Frazer Harrison/Getty Images
Warren Beatty and Shirley MacLaine are siblings. Shirley MacLaine was born Shirley MacLaine Beatty, and Warren Beatty was born with the name Henry Warren Beatty.
see more on Warren Beatty

Charlie Sheen is listed (or ranked) 2 on the list Celebrities You Might Not Know Are Siblings
Photo:  Imeh Akpanudosen/Getty Images
Men at Work co-stars Charlie Sheen and Emilio Estevez are brothers. Both brothers were born with the last name Estevez, but Charlie (born Carlos Estevez) decided to adopt the stage name of their father, Martin Sheen.
see more on Charlie Sheen

Lily Allen is listed (or ranked) 3 on the list Celebrities You Might Not Know Are Siblings
Photo:  Dave M. Benett/Getty Images
Pop singer Lily Allen's brother, Alfie, plays Theon Greyjoy on the HBO drama Game of Thrones.
see more on Lily Allen

David Sedaris is listed (or ranked) 4 on the list Celebrities You Might Not Know Are Siblings
Photo:  Belinda Hankins Miller/WBUR/Wikimedia Commons/CC BY 2.0/CC BY-SA 2.0
The acclaimed humorist writer of Me Talk Pretty One Day and Let's Explore Diabetes with Owls is the older brother of Strangers with Candy star Amy Sedaris. see more on David Sedaris