is "over the moon" after adopting a baby girl, who she has named Eloise Joni after her late mother Joni, who died from cancer in 2007.
The 'World Is Not Enough' star - who used to be married to former 'Two and a Half Men' star Charlie Sheen, who she has daughters Lola, six, and seven-year-old, Sam with - changed her twitter profile to reflect her new addition.
Denise wrote on the social networking site: "Thank you all for your sweet messages. The girls and I are over the moon and so is my dad Grandpa Irv . xo. (sic)"
She altered her profile to read: "Actress, single mom of three adorable daughters, animal lover, some say I'm a good cook, and I'm always up for trying something new."
Sam and Lola helped the 40-year-old beauty
decide the first part of the American tot's name.
A representative for Denise explained: "Eloise Joni Richards is named after Denise's mom (Joni) and Denise and her daughters Sami and Lola chose the name Eloise. Denise and Eloise's big sisters couldn't be happier and feel incredibly blessed."