If you needed any more proof that the former cast of Laguna Beach is all grown up, yet another member of the O.C. cool kids’ club has followed in Alex M.’s recent footsteps by welcoming a baby to the family.

WEST HOLLYWOOD, CA - JULY 07: Television personality Casey Reinhardt attends the Open Campus launch party at Mel's Diner on July 7, 2009 in West Hollywood, California. (Photo by Charley Gallay/Getty Images)

Casey Reinhardt (who announced her pregnancy back in April) has given birth to her own offspring, daughter Kensington Kelly Brown, and can we just say that she is absolutely PRESH?!

Born just a few days ago, Kensington made her Instagram debut on Casey’s husband Sean Brown’s page, where he shared this sweet snap of his happy little tot, writing, “Kensington Kelly Brown stole my heart on 8/16/16. I love you forever. Casey, you have made my life immeasurably better in every possible way. Life is good!”

Awww, how sweet!

Though Casey has yet to share pics of herself with her newborn babe on her own account just yet, if her auntie skills are any indication, we think she’s going to be jussstt fine: Check out this adorable still she posted just a few weeks back!

“Happy 4th birthday to my first baby Preston!!!!” she wrote. “I love you so much and I’m so proud to be your auntie!!! You’ve prepared me for motherhood more than you know and I am sooo proud of you!!! You are the sweetest, smartest and funniest little boy. Love love love you!!”

Yep. Girl’s a natural. Congratulations Casey and Sean!

Are you surprised to see the cast of Laguna Beach all grown up? Share your thoughts over @BritandCo!

(h/t E!, photos via Charley Gallay + Peter Kramer/Getty)