Serena Williams just revealed that she's going to be a mom with an understated but exciting Snapchat! The tennis pro shared on social media that she's 20 weeks pregnant with her and fiancé Alexis Ohanian's first child. In the snap, Serena showed off her growing bump in a vibrant swimsuit, and fans are thrilled for her growing family.
Although some celebs keep their pregnancies under wraps for as long as possible, others prefer to spread the news on their own terms, be it via social media or on stage. From Beyoncé's unforgettable VMAs performance to Justin Timberlake's sweet kiss on Jessica Biel's belly, take a look at how these 25 famous parents-to-be shared their exciting baby announcements with their fans.