The couple discovered the sex of their baby this week when the midfielder's other half, who was hoping for a girl, had her 20-week scan.
"After having two boys I was really keen for a little girl and, as soon as the doctor told me it was a boy, I got very emotional," Danielle wrote in her column for Closer magazine.
"As soon as I got home, though, and saw my two amazing boys, I felt like such a fool and realised there are some people who can't even have kids, so I'm so lucky to have three healthy boys. I just can't wait to meet my new son now."
The couple already have two young sons Archie and Harry.