Welcome to the world, Story!

Soleil Moon Frye — who gave birth to Baby No. 4 just four days ago! — took to Instagram on Thursday, May 19 to share the most precious snapshot of her newborn son.

"Our Story feels complete. So in love with our little man. My heart is bursting. Born 5/16 at 5:16. All ten pounds of him," the former Punky Brewster star captioned the sweet pic of her little boy.

RELATED: Soleil Moon Frye Reveals Her Two-Year-Old Son Won't Stop Calling Her Punky Brewster!

Soleil, 39, and her husband, Jason Goldberg, 44, previously announced they were expecting their fourth child last November. The couple — who married in October 1998 — are already parents to daughters Poet, 10, and Jagger, 8, and son Lyric, 2. Congrats to the adorable family on their new addition!

Click through the gallery below to see more cute celebrity babies!