Barry Gibb and Linda Gray

Barry Gibb of the Bee Gees pop group, who arrived at Sydney airport from London today with his fiance, Linda Gray, 18. December 26, 1968. (Photo by Alan Gilbert Purcell/Fairfax Media via Getty Images).

LOS ANGELES, CA - FEBRUARY 12: Musician/Producer Barry Gibb and Linda Gray Gibb during The 59th GRAMMY Awards at STAPLES Center on February 12, 2017 in Los Angeles, California. (Photo by Christopher Polk/Getty Images for NARAS)

LOS ANGELES, CA - FEBRUARY 12: Singer Barry Gibb and Linda Gray attend the 59th GRAMMY Awards at STAPLES Center on February 12, 2017 in Los Angeles, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)

LOS ANGELES, CA - FEBRUARY 14: Singer Barry Gibb (L) and Linda Gray attend "Stayin' Alive: A GRAMMY Salute To The Music Of The Bee Gees" on February 14, 2017 in Los Angeles, California. (Photo by Kevin Mazur/WireImage)

LOS ANGELES, CA - FEBRUARY 07: Recording artist Barry Gibb (L) and Linda Gray attend the Pre-GRAMMY Gala and Salute to Industry Icons honoring Martin Bandier at The Beverly Hilton Hotel on February 7, 2015 in Los Angeles, California. (Photo by Lester Cohen/WireImage)

Barry Gibb and Linda Gray attend "G'Day USA 2011" Black Tie Gala at Hollywood Palladium on January 22, 2011 in Hollywood, California. (Photo by John Sciulli/WireImage)

Barry Gibb and Wife Linda Ann Gray during 25th Annual Songwriters Hall of Fame Awards Dinner and Ceremony at Sheraton Hotel in New York, New York, United States. (Photo by Jim Smeal/Ron Galella Collection via Getty Images)

Barry Gibb and wife Linda Ann Gray during Barry Gibb and Wife Linda Ann Gray Sighting at the Hilton Hotel in Beverly Hills - February 8, 1980 at Hilton Hotel in Beverly Hills, California, United States. (Photo by Ron Galella/Ron Galella Collection via Getty Images)

(Original Caption) British singer Barry Gibb from the pop group the Bee Gees, at his wedding to Linda Gray. (Photo by © Hulton-Deutsch Collection/CORBIS/Corbis via Getty Images)

Singer Barry Gibb of the Bee Gees in Miami, Florida, with his wife Linda (nee Linda Gray, the former Miss Edinburgh), March 1978. (Photo by Michael Brennan/Getty Images)

Singers Barry (right) and Robin Gibb (1949 - 2012) of the Bee Gees return from the US with Barry's wife, former Miss Edinburgh Linda Gray, London Airport, UK, 8th March 1971. (Photo by George Stroud/Daily Express/Getty Images)

British singer, songwriter, musician and record producer Barry Gibb with his girlfriend Linda Gray, UK, 8th June 1970. (Photo by Reg Burkett/Daily Express/Hulton Archive/Getty Images)

Singer Barry Gibb of The Bee Gees marries Linda Gray, 1st September 1970. (Photo by Keystone/Hulton Archive/Getty Images)

Barry Gibb pictured at home with his girlfriend Linda Gray, posing with a model Colt 0.45 on the staircase at his home. December 1968. (Photo by Daily Mirror/Mirrorpix/Mirrorpix via Getty Images)

Recently re-formed pop group the Bee Gees, walking arm-in-arm with Linda Gray, London, 21st August 1970. Left to right: Robin Gibb (1949 - 2012), Linda Gray, Barry Gibb and Maurice Gibb (1949 - 2003). Gray and Barry Gibb were married the following month. (Photo by Jack Kay/Daily Express/Hulton Archive/Getty Images)

British singer-songwriter Barry Gibb and his girlfriend Linda Gray sit on Gibb's Roll Royce, UK, 28th October 1968.(Photo by Larry Ellis/Daily Express/Hulton Archive/Getty Images)

He was taken there after a revolver was fired outside his penthouse flat in the City of London October 1968 (Photo by Mirrorpix/Mirrorpix via Getty Images)

British singer and songwriter Barry Gibb pointing a gun, while sitting next to his girlfriend, former Miss Edinburgh Linda Gray, UK, 19th October 1968. (Photo by Pierre Manevy/Daily Express/Getty Images)