Eileen Johnston was born on 3 September 1922 as the daughter of George Johnston and his wife, Alice Percival in Chester, England.
Not much is known about her youth. On 6 November 1943, she first married André de Coppet, a director of the Continental Bank and Trust Company of New York. Her new husband had previously been married to Muriel Johnson Belasco but they were officially divorced in August 1943. They spent their honeymoon in Sea Island, Georgia.1 They went on to have two daughters together: Diane (born 19442) and Laura (born 19463) Her husband died in August 1953 after suffering a heart attack.4
On 8 September 1966, Eileen married Carol Victor, Hereditary Prince of Albania. He was the only son of William, Prince of Albania, who briefly ruled the Principality of Albania. The ceremony took place at the St. James Episcopal Church with her daughters from her first marriage attending on her. The wedding announcement stated that they would divide their time between Munich and New York.5 They would not have any children together, leading to the extinction of his line.
Eileen was widowed again when Carol Victor died on 8 December 1973. Eileen survived him for 12 years. She died on 1 September 1985 in New York and was buried with her first husband at Woodlawn Cemetery in New York.