Aga Muhlach was born at 2:30 PM on August 12, 1969 at Galang Maternity Clinic in Santa Cruz, Manila. The rest of his family consists of two sisters, Arlene and Almira, a half-brother named. When Aga was eight years old, his parents saw his acting talent and enrolled him in an acting program. He went to Aquinas School for his formal education before enrolling in San. Aga Muhlach finished high school at Aquinas School in San Juan City, and entered San Beda College to study Commerce.
Aga Muhlach finished high school at Aquinas School in San Juan City, and entered San Beda College to study Commerce.