Drew Arellano's birthday message to eldest son Primo

On August 30, 2016, Kapuso couple Iya Villania and Drew Arellano became first-time parents with the birth of their son Antonio Primo Arellano.

Four years later, Primo is already a loving kuya to his younger siblings, Alonzo Leon and Alana Lauren, as the Arellano family grow in number over the years.

On Instagram, Drew thanked his eldest for making him realize one valuable thing in life: being a father.

He said, “Happy 4th birthday to the first person who made me realize there is nothing more satisfying than being a father. Love you, 'Mhiyeeeeeeeen!'”

Along with the caption are a series of photos of him and Primo enjoying their father-son bonding.

Several of Drew's fans greeted the birthday boy as he turns another year older.

Fans send their birthday greetings to Primo Arellano / Source: drewarellano (IG)

Iya and Drew celebrated the birthday of their two sons who share the same birth month -- August 19 for Leon and August 30 for Primo -- last Sunday, August 24.

The couple held a mini celebration at the safety and comfort of their home amid the quarantine.