Sabina Barretto, the eldest child of actress Claudine Barretto, is now officially a lady, as she turned 18 years old on Tuesday, June 21.

To mark the occasion, Claudine took to Instagram to pen her daughter a heartwarming birthday greeting.

View this post on Instagram

A post shared by Claudine Barretto (@claubarretto)

"To my firstborn, my 1st daughter, my life. Happy happy 18th birthday @sab_barretto. I thank you so much for making me a mother. The moment I held you in my arms I knew that we were meant to be. That you were mine. How I remember that moment like it was yesterday," wrote Claudine.

"Now that you are an adult, know that you will always be my baby. I cannot promise you that I will solve all your problems but know that you will never have to face them alone. I will forever be here for you, whether you like it or not," she said. "It’s an honor to be your Mom. I love you more than you’ll ever know."

Just last June 13, it was Quia Aryanna, the youngest daughter of Claudine, who celebrated her seventh birthday.

READ: Claudine Barretto marks daughter Quia’s birthday

Both Sabina and Quia are adopted children of Claudine.

Aside from the two, the actress dubbed local showbiz's "The Optimum Star" also has two sons — Santino and Noah.

Santino, 14, is Claudine’s biological child with her estranged husband, actor Raymart Santiago. Meanwhile, Noah is also adopted.