Vanessa Minnillo is wearing an engagement ring after Nick Lachey went down on one knee, according to reports.
The former Newlyweds star, 36, proposed to his 29-year-old girlfriend with an Asscher-cut diamond ring with diamond baguette detail.
Us Magazine quoted a source as saying that the pair are "thrilled".
In a statement, the couple said that they were looking forward to a "wonderful future together".
Actress Minillo was born in the Phillipines and has starred in a number of US television shows, while Kentucky-born Lachey found fame singing with the boyband 98 Degrees.
The couple have had their share of ups and downs, as Lachey went through a highly publicised divorce from singer Jessica Simpson, who he starred with on the MTV series Newlyweds, in 2006.
Recently, tennis star Maria Sharapova received a diamond engagement ring from her LA Lakers player fiance, Sasha Vujacic – the item is estimated to be worth $250,000 (£156,000).