Holden and Audrey had an affair during the filming
despite Holden being married--This could have been a real life big 1950's hollywood love story except for one thing: Audrey wanted kids, and Holden had gotten a vasectomy long ago, and back then vasectomies were NOT reversible
Ten years later he tried to rekindle their affair, but having aged badly due to alcoholism, Audrey said "no thanks" plus she was still married at the time