The role of Claudia Buenavista was initially offered to Snooky Serna, but due to scheduling conflicts, she was forced to turn it down-a decision she would later come to deeply regret. The role ultimately went to Jean Garcia, whose compelling performance not only redefined the character but also catapulted her career to greater heights.
Jean Garcia became pregnant midway through the series, prompting the creative team to cleverly adjust her character's presence. Claudia was often depicted in dark dresses and a veiled fishnet, ominously lurking in the shadows and wreaking havoc. After giving birth, Garcia was approached by director Rory Quintos and agreed to return. Her comeback scene, shot in a hospital, featured her character gazing into a mirror, her face marked with scars, as she delivered the chilling line: "Ang galing mo, Claudia. Ang galing-galing mo!"
Kristine Hermosa and Jericho Rosales developed a real-life romance during production.
Eula Valdes' signature colorful cigarettes as Amor Powers became an iconic trend in the early 2000s, further cementing her character's fierce and glamorous persona in the series.
Pangako Sa 'Yo became the first Filipino television series to air in Kenya, debuting on the national broadcaster KBC. Its overwhelming popularity led to a highly successful rerun on Citizen TV, opening the doors for Filipino teleseryes to dominate Kenyan television for over two decades. In Tanzania, the series aired on the national broadcaster TBC (formerly TVT), marking a significant shift in local viewing preferences from Latin American telenovelas to Filipino dramas.
In Malaysia, Pangako Sa 'Yo premiered on the satellite channel Astro Bella due to high demand, starting on November 22. It aired in Tagalog with Bahasa Melayu subtitles, running Monday to Friday at 11:00 AM, with same-day encore broadcasts and weekend marathons. Similarly, in Singapore, the series was reintroduced via Malaysia's Astro Prima on mio TV Channel 602 on April 10, 2013, following its initial airing on Suria in 2007. The show aired in Tagalog with Bahasa Melayu subtitles, running weekdays from 5:30 PM to 6:30 PM, with encore broadcasts at 10:00 AM and 12:00 midnight.
In Malaysia, Pangako Sa 'Yo premiered on the satellite channel Astro Bella due to high demand, starting on November 22. It aired in Tagalog with Bahasa Melayu subtitles, running Monday to Friday at 11:00 AM, with same-day encore broadcasts and weekend marathons. Similarly, in Singapore, the series was reintroduced via Malaysia's Astro Prima on mio TV Channel 602 on April 10, 2013, following its initial airing on Suria in 2007. The show aired in Tagalog with Bahasa Melayu subtitles, running weekdays from 5:30 PM to 6:30 PM, with encore broadcasts at 10:00 AM and 12:00 midnight.