United Kingdom, Nov. 12 -- Demi Moore believes an alien encounter "definitely happened" in her hometown.

The Substance actress was born and raised in Roswell - the New Mexico town most famous for the 1947 Roswell Incident, which saw the recovery of debris from a crashed military balloon that led to conspiracy theories it was from an extraterrestrial spacecraft - and always felt "secret" happenings were deliberately not spoken about until it became the focus of documentaries and the TV show Roswell.

Appearing on The Late Show With Stephen Colbert, Demi said: "I just heard of your fascination with aliens, of which my children often have said that they think I'm part alien."

Asked by Stephen why Rumer, 37, Scout, 34, and 31-year-old Tallu...