According to New York Post columnist Cindy Adams, the couple, who started dating in 2007, had a small argument over money which made the Kill Bill star decide that the engagement should be ended.
"The engagement ended awhile back - almost two months ago. They remain friends," Contactmusic quoted a source as saying. Uma then walked out 'in a huff', said the source.
The couple got engaged in 2008, with Arpad presenting the actress with an eight-carat diamond engagement ring - which she is returning to him. "She will probably give it back. She wants to return everything that is his," the source added.