The ex-Chelsea player took to Instagram to reveal the very exciting news with his 2.9 million followers.
The 39-year-old shared a picture of the couple, who wed in 2015, alongside his two daughters from a previous relationship.
Frank stated: “We have some exciting news we wanted to share with you. The Lampard family is growing!
“My gorgeous wife @christinelampard is pregnant and we all couldn’t be happier!!!”
Christine, 39, also took to the photo-sharing site to share the happy news, telling her 264,000 followers: “The Lampard family are expanding!!! I feel SO excited, nervous and grateful!
“The list of emotions is endless,” she gushed.
More to follow…