The following is a list of birthdays (that we know of) of those who starred in and 
made XANADU. All dates provided by Wikipedia.

OLIVIA NEWTON-JOHN (Kira) September 26, 1948

MICHAEL BECK (Sonny) February 4, 1949

GENE KELLY (Danny) August 23, 1912

JEFF LYNNE (Electric Light Orchestra) December 30, 1947

JOHN FARRAR (Songwriter & Producer of ONJ tracks) November 8, 1946

ROBERT GREENWALD (Director) August 28, 1945

LAWRENCE GORDON (Producer) March 25 1936

JOEL SILVER (Co-Producer) July 14, 1952

CLIFF RICHARD (Co-singer on Suddenly) October 14, 1940

KENNY ORTEGA (co-choreographer) April 18, 1950

SANDAHI BERGMAN (one of the muses) November 14, 1951

​

The following are the birthdays of those who starred and made the original 
production of XANADU ON BROADWAY. As before, all dates provided by 
Wikipedia.

KERRY BUTLER (Cio/Kira) June 18, 1971

CHEYENNE JACKSON (Sonny) July 12, 1975

TONY ROBERTS (Danny) October 22, 1939

JACKIE HOFFMAN (Calliope & Aphrodite) November 11, 1960

MARY TESTA (Melpomene &Medusa) June 4, 1955

ROBERT AHRENS (Producer) unknown

DOUGLAS CARTER BEANE (Writer) unknown