"One of the greatest gifts we could ever ask for," Robinson wrote alongside a snapshot of the happy couple sitting in front of gold "Baby" balloons. "Leslie and I are so excited to share the news that we have a sweet baby on the way."
Odom, 35, shared a similar photo of himself and his beaming wife, which he captioned with a letter to his forthcoming progeny: "Little one, you're on our mind all the time. Keep eating and growing! We love you and we're already so proud of you! Love, your mom and dad."