Could she be any cuter?!
"6 months old!" the Grammy winner, 37, captioned a sweet snapshot of his model wife, 30, with their baby girl.
Chrissy also took to Instagram to acknowledge the special day with a brief clip of herself and Luna on a slide together.
"I can't believe you have been making me laugh and smile and extremely sleepy for 6 months now!" Chrissy wrote alongside the video. "First trip to the park. Best NYC stroll day ever. I love you, my Lu!"
One day later in a Twitter Q&A, Chrissy opened up about Luna's latest milestone -- and what she can't wait to see her do next.
"I am so ready for Luna to start walking, but she's got to start crawling first," Chrissy explained after a fan asked, "Are you ready for Luna to start walking?"
"She's flipping back and forth right now, which is really, really cute, on her little back and tummy and she goes crazy doing it. It's so cool to see," Chrissy added.
"But I'm ready for her to start walking and I'm ready for her to start playing and eating and throwing food and going crazy. I'm excited."
On Oct. 16, Chrissy shared another adorable video of John holding a delighted Luna as the tot watched Chrissy do a silly song-and-dance routine for her.
"The dumber you look, the happier they are," Chrissy captioned the clip.
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