"The prettiest lil thing," the "I Like It" rapper wrote.
The now-pregnant actress shares 3-year-old son Ever Leo with her husband Zandy Reich.
The Venezuelan singer, who made the announcement on her Instagram, dropped a new single dedicated to their unborn daughter.
"not pregnant--just down bad cryin at the gym," Gaga wrote across her TikTok response.
"I’ve had so much said about me and I’m sure that has robbed me of some experiences," she said.
"Best day of my life," the model and social media personality captioned her announcement.
The model shows off her bare belly in another post from the singer from the couple's vacation.
The star is expecting her first child with husband Cole Tucker.
The Mean Girls actress showed off the nursery made in collaboration with Nestig.
This is the couple's first child together.