The announcement means that Ronaldo will be the father of twins for a second time.
The expectant twins will be the third child for the couple.
The mother of the twins, who were born in June 2017, has also not been identified, according to the website.
In August, Manchester United announced the team reached a deal with Juventus that allowed Ronaldo to return to the team, People reported.
By using this website, you accept the terms of our Visitor Agreement and Privacy Policy, and understand your options regarding Ad Choices.