“What a gift!” the 24-year-old singer’s mom wrote, along with a heart-eyes emoji, in the caption to the beaming snapshot, which shows Baldwin giving her mother-in-law a kiss on the head.
Baldwin returned the kindness, writing “Love you” in the comments to the adorable pic.
“Justin and Hailey are so happy and inseparable,” a source told ET on Tuesday. “They are thrilled that they can finally share their love and commitment with family and friends.”
As for the planned event, “They want the music, entertainment and exciting details to be a big surprise for their guests,” the source added.
A source previously confirmed to ET that happy couple secretly tied the knot last September after they were spotted at the Marriage Bureau in New York City.