“We are over the moon and madly in love," the couple told People magazine.
The pair shared the news of their engagement since last October and announced the pregnancy in May.
Pregnancy wasn't always easy for the 5-foot-2 star, she told Hello magazine.
"I started out at 106 pounds and guess how much I weight now? Around 145 pounds!" she told the magazine. "The worst part is that my feet are still size five and they're going, 'What's going on with all this weight?' They're about to snap from underneath me with the strain!"