Toni Gongaza was born as Celestine Cruz Gonzaga to the talent managers Carlito Gongaza and Crisanta Gongaza on 20th January 1984 in Taytay, Rizal, Philippines. Toni is the elder sister of Alex Gonzaga, who is also an actress and a television host by profession. She attended Dominican College to study mass communication but after two years she transferred to Asian Institute for Distance Education where she studied AB English. She graduated with a Bachelors degree in Multimedia studies from University of the Philippines Open University.
Toni Gonzaga began her career while in her teenage. She was 13 when she introduced herself to the entertainment world through a Metro pop Star search music competition. The program had two other current Filipina singers, Kyla and Faith Cuneta beside her. Though she didn't win the competition, she gained an exposure which led her to get various opportunities later on.