Separated at birth, usually phrased as a question, is a light-hearted media device for pointing out people who are unrelated but bear a notable facial resemblance, implying that they are twins who were separated soon after being born and presumably adopted by separate families.

The title "Separated at Birth?" was a trademark of Spy Publishing Partners, the publishers of the now defunct Spy Magazine, a monthly publication that published satire, humor, and investigative journalism from 1986 to 1998. The magazine would pair two carefully selected photos of two unrelated famous persons and the juxtaposition would highlight their physical similarities to humorous effect.

There were several Separated at Birth? books issued around the same time, with whimsical comparisons such as Mick Jagger

Mick Jagger

Sir Michael Philip "Mick" Jagger is an English musician, singer and songwriter, best known as the lead vocalist and a founding member of The Rolling Stones....

 vs. Don Knotts

Don Knotts

Jesse Donald "Don" Knotts was an American comedic actor best known for his portrayal of Barney Fife on the 1960s television sitcom The Andy Griffith Show, a role which earned him five Emmy Awards...

 as the fictional film character The Incredible Mr. Limpet

The Incredible Mr. Limpet

The Incredible Mr. Limpet is a 1964 American live-action/animated film from Warner Bros. It is about a man named Henry Limpet who turns into a talking fish resembling a tilefish and helps the U.S. Navy locate and destroy Nazi submarines. Don Knotts plays the title character. The live action was...