It's hard to believe this, but little Lexi Manzo is officially an adult. Dina Manzo's little girl isn't so little anymore — the young woman just turned 18 years old! Proving once again that she's on great terms with Dina, Teresa Giudice didn't miss this opportunity to wish her pal's daughter a happy birthday.

The Real Housewives of New Jersey star took to her Twitter account to send out a shout-out to Lexi.

"Happy Birthday @Lexmanzo can't believe you are 18.. You are beautiful inside and out enjoy your big day Kisses…," Teresa wrote.

Dina, of course, also put out her own heartfelt message to her girl. The proud mama went on Instagram to share a cute photo collage of Lexi from when she was just a kid to her more current photos.

"I wanted her to stay little forever...but my baby girl is 18 today. I love you Lex to the moon & back! Thank you for choosing me as your Mama! I'm so proud of the kind compassionate witty young lady that you are! Happy Birthday!!!" Dina wrote next to the images.

Later, she shared a video clip of Lexi showing off her veggie-catching skills at her hibachi restaurant celebration.

"Yes she chose hibachi as her bday dinner...such talent...my girl @lexmanzo," Dina commented alongside the vid.

It looks like Lexi had a great day. Happy birthday, girl!

Can you believe that Dina's daughter is 18 years old already? Share your thoughts in the comments section below!