Did Princess Diana every dance ballet on stage with Prince Charles in the audience?

As B.E.C said, she did dance with him at a charity event to which Prince Charles was present. She didn't tell him that she was doing this, wanting to surprise her husband.

The routine was danced to "Uptown Girl"

Photo from that night can be seen here: http://www.waynesleep.org/diana3.gif

Did Princess Diana every dance ballet on stage with Prince Charles in the audience?violin

it is possible. Lady Di wanted to be a professional ballerina, but was too tall. so who knows if she had performances open to outsiders at her school. did you see the special on TV w/ her nanny, and teachers? her life ended too soon.:o(

Did Princess Diana every dance ballet on stage with Prince Charles in the audience?chinese theater opera theater

Very unlikely, even as an amateur. To be a good ballerina takes more training and concentration than Diana would have liked.
All I know is that she did not put out with her father in law Prince Phillip. Because of not having sex with her father in law, Prince Phillip had Princess Di killed.
Yes, the song she performed to was Billy Joel's Uptown Girl.She perfomed the jazz routine with Wayne Sleep,an ex-Royal Ballet dancer, at a charity benefit at Covent Garden, and drew criticism from Charles and the Palace. He thought she was making a spectacle of herself.But Diana was very satisfied with her dancing.
She was not a bad dancer, she danced good with John Travolta.