View this post on Instagram

[1]

Serena Williams and Alexis Ohanian [2] welcomed a beautiful baby girl, Alexis Olympia Ohanian Jr. [3], in September, and she just proved you're never too young to celebrate Halloween. On Tuesday, the couple shared an adorable Instagram photo of their daughter [4] dressed up as Batman, complete with her very own Batmobile. "When you realize you're the hero Gotham needs," the caption read. Little Alexis may be only 2 months old, but she's already a pro at melting hearts.