The Achy Breaky Heart hitmaker was due to sit down with the CNN newsman for his first in-depth chat concerning the former Hannah Montana star's antics at the prizegiving on Sunday (25Aug13).
Cyrus stunned the crowd at the Barclays Center in New York, gyrating in a nude-coloured, latex two-piece and groping collaborator Robin Thicke with a huge foam finger.
But her dad decided to back out of the interview at the last minute, prompting Morgan to discuss his cancellation with another guest, filmmaker Morgan Spurlock.
The newsman said, "Billy Ray was supposed to be on the show tonight to explain his daughter's behaviour, but..."
Spurlock replied, "He's got some explaining to do", to which Morgan added, "I'm not sure he's quite worked out what his explanation is yet so we've decided to postpone it. We are going to get the first interview. I know he's watching tonight, so, Billy Ray, good evening, and when you're ready, we will talk about this."