Lauren Conrad is not only a super excited mama-to-be (check out pics from her chic baby shower) and fashion designer — girl just launched a new swimwear collection — she’s also a totally dedicated granddaughter. In fact, it was while helping Grams move that the former Laguna Beach and Hills star found her perfect baby sex announcement in a rediscovered keepsake.

Lauren Conrad

Taking to Instagram to make the big reveal (as most celebs are wont do these days), Conrad posted a pic of an adorable little dude driving a car, with the words, “It’s a guy” scrawled along its side. The 31-year-old explained its significance with an accompanying caption which read, “I found this adorable birth announcement while helping my Grandma move and I thought it was the perfect way to share that William and I are expecting a baby boy 👶🏼!” Eee!

She wasn’t wrong — everything about this announcement is beyond cute, from the vintage card to its super sweet backstory.

Now, all that’s left is to choose the perfect little boy name… and, should she happen to need any help, we’re pretty sure her old co-star Kristin Cavallari can offer some baby-naming advice (just like she did for Heidi Montag)!

Congrats, LC!

What do you think Lauren Conrad should name her baby boy? Let us know @BritandCo!

(h/t Refinery29; Photo via Dimitrios Kambouris/Getty)