Niemi, who was married to the 'Ghost' actor for 34 years before his death from pancreatic cancer in September 2009, is set to marry jeweller DePrisco after he proposed earlier this week, reported Ace Showbiz.
A spokesperson for the 'Beat Angel' actress said, "Albert proposed to Lisa on Christmas Eve."
The couple began dating 18-months ago after being introduced by mutual friends at Niemi's birthday party.
The 57-year-old dancer previously said that she would like to find love again shortly after the first anniversary of Swayze's death.
Earlier this year, actress Kirstie Alley claimed that she fell in love with Swayze while filming 'North and South' but never acted on her feelings because they were both married.