Ethel Colt was born on April 30, 1912 in New York City, New York, USA as Ethel Barrymore Colt. She was married to John Romeo Miglietta. She died on May 22, 1977 in Bristol, Rhode Island, USA.

Daughter of Ethel Barrymore; sister of John Drew Colt and Samuel Colt.

Gave birth to her only child at age 32, a son John Drew Miglietta on September 10, 1946. Child's father was her husband, John Miglietta.