Liza Minnelli brought the cast of the new Sex and the City movie to tears when she performed for them.

The iconic singer, who has a cameo appearance as herself in the coming film, played a song for the cast when shooting wrapped on her scene.

According to gossip blogger Perez Hilton, actor Nicholas Rodriguez said: "Liza's scene is ginormous with a huge budget and pretty much everybody is in it, including Sarah Jessica Parker, Chris Noth, Kristin Davis, Kim Cattrall and Cynthia Nixon.

"After the shoot, Liza said, 'I would like to have everyone's attention,' and they pulled out a stool for her at the piano and gave her a mic and she sang a favourite of her mother, Judy Garland."

Minnelli is a guest at the film's "shock wedding", rumoured to be that of gay characters Stanford Blatch and Anthony Marentino.