Christina Cassini lost her fight with ovarian cancer at the age of 66 last week (ends03Apr15).

According to the New York Post, Christina died in poverty after a lengthy battle with her father's widow and estate executor, Marianna Nestor Cassini, who allegedly refused to pay her only surviving stepdaughter the $1 million (£625,000) she was bequeathed in her dad's will.

Christina, a mother of four, had reportedly been hospitalised since November (14).

Tierney died in 1991, while Oleg Cassini passed away in 2006. The couple had another daughter, Daria, who died in 2010.

The famed designer, who dressed the likes of Grace Kelly and former U.S. First Lady Jackie Kennedy, left an estate worth $60 million (£37.5 million).