Giorgio A. Tsoukalos

Giorgio A. Tsoukalos is a Swiss-born writer, television presenter, and producer. He is a proponent of the pseudo-archaeological theory that ancient alien astronauts interacted with ancient humans. He is best known for his appearances on the television series Ancient Aliens.

Tsoukalos was born in Lucerne, Switzerland, in 1978. He is of Greek-Austrian heritage. He graduated from Ithaca College in Ithaca, New York, in 1998 with a bachelor's degree in communications. After graduating, he worked as a bodybuilding promoter and a volunteer in IFBB sanctioned bodybuilding contests, including Mr. Olympia. He produced and directed the annual IFBB San Francisco Pro Grand Prix from 2001 to 2005.