The Ghost star portrayed a club singer on the run who took shelter in a convent in the original 1992 comedy and its 1993 sequel Sister Act 2: Back in the Habit.

Fans have been lobbying for another sequel ever since, but Whoopi shot down the notion last year (14), when she suggested a follow-up would be disrespectful to the memory of many of her elderly co-stars, who have since passed.

"There's no chance that I will ever do another Sister Act," she declared during a Facebook fan chat in April, 2014. "Too many of the nuns have passed, like Mary Wicks (sic). How could you ever do another Sister Act without them?"

However, it appears Whoopi has since softened her stance on the idea.

She tells U.S. breakfast show Good Morning America. "Anything is possible, anything is doable, and it was a good and wonderful film and we had fun."

Mary Wickes, who played Sister Mary Lazarus in both films, died in 1995, aged 85. Other lost castmembers include Rose Parenti, who played Sister Alma, and a number of actresses who featured in the nuns' choir.

The movie's legacy has since been given a big boost after it was adapted for the stage, finding success on Broadway and in London's West End.