The Black Sabbath rocker, 73, was due to appear on Morgan's TalkTV show Piers Morgan Uncensored on Thursday (21 July) to talk about his music and his health after recovering from COVID and undergoing major surgery to his spine.
But when the interview started it was just Sharon, 69, appearing by video link.
"Now I’ve spent the past 20 minutes boasting about the fact that it was going to be you and Ozzy and he’s done a runner!" Morgan said.
We regret to inform you we've been stood up by Ozzy Osbourne tonight.
Sharon: "He's become a diva again. He thinks he's bloody Beyoncé!"@OzzyOsbourne | @MrsSOsbourne | @piersmorgan | @TalkTV pic.twitter.com/g4D9Ros6Ym
— Piers Morgan Uncensored (@PiersUncensored) July 21, 2022
Sharon didn't mince her words, telling the broadcaster: "He’s a bastard tonight let me tell you."
She went on: "Now he’s back walking he’s a diva. Before it was like the nicest guy, 'Please help me do this, do that', now he’s walking he’s like 'I don’t want to do it. I’m not doing this, I'll do this'.
"So he has become a diva again. He thinks he’s bloody Beyonce!"
Morgan was tickled and started to laugh.
"Well I quite like the fact he’s a diva again because it means he’s healthy again at least," he said.
A clip of their exchange was later shared on Twitter with the caption: "We regret to inform you we've been stood up by Ozzy Osbourne tonight."
Ozzy had an operation last month to remove and realign the pins in his neck and back that were inserted following a quad-biking accident in 2003.
TV presenter Sharon flew to the US to be by his side, and told viewers on her show The Talk: "He has a very major operation on Monday and I have to be there.
"It's really going to determine the rest of his life."
On Morgan's show, she said the rocker - who shared in 2020 that he had been diagnosed with Parkinson's - was doing well.
She said he was back on his feet and out of pain.
Watch: Ozzy Osbourne walking with a cane after undergoing 'life-altering' surgery