The couple married in March 2002

News that the couple had split after 16 months was confirmed at the weekend.

"Liza and David have separated but I'm not aware of any plans for divorce," the spokesman said in Los Angeles on Monday.

Their glitzy wedding in New York in March last year was attended by stars including Elizabeth Taylor, Michael Jackson, Janet Leigh, and Mia Farrow.

Earlier this year they cancelled plans for a wedding anniversary party for 1,200 guests in Times Square, citing the war with Iraq and Minnelli - the daughter of Judy Garland - entering rehab.

Minnelli said Gest had helped her lose weight

It was thought 50-year-old producer Gest was staying in Hawaii while 57-year-old Minnelli remained in New York, website Newsday.com reported.

On Friday, the couple had cancelled a joint interview booked for next week on popular CNN talkshow Larry King Live.

Relaunched career

The singer has fought to recover from back and hip surgery, viral encephalitis and an addiction to painkillers in recent years.

She relaunched her career after her marriage and said Gest had been a major influence in her losing weight and regaining her health, allowing her to go on tour successfully.

Last week, Minnelli and Gest appeared on a candid show fronted by Ruby Wax, which was full of public displays of affection by the couple as they spent time in London, for Gest's 50th birthday.

In July last year, Minnelli agreed to take part in a reality show to be screened on US music channel VH1.

The programme had planned to follow Minnelli and her husband David Gest as they hosted weekly dinner parties with celebrity friends in their Manhattan penthouse.

But it was cancelled after producers said they had not had the access promised, leading Minnelli and Gest to take legal action.