They've remained good friends even after their split.

That showed on Monday when Vhong Navarro and Bianca Lapus came together to see their son graduate from high school.

On Instagram, they looked every inch the proud parents as they revealed that they watched Isaiah, or Yce, claim his diploma.

"Anak ang sarap ng pakiramdam na makita kang umaakyat sa stage," Navarro wrote. "Iyang ngiti mo na 'yan triple ang saya na nararamdaman ko. ...Mahal na mahal kita."

From Vhong Navarro and Bianca Lapus' Instagram account

From Vhong Navarro and Bianca Lapus' Instagram account

From Vhong Navarro and Bianca Lapus' Instagram account

From Vhong Navarro and Bianca Lapus' Instagram account

From Vhong Navarro and Bianca Lapus' Instagram account

Lapus, meanwhile, admitted that she got teary-eyed during the ceremony.

In her heartfelt post, she reminisced about the first time her son went to school, the sacrifices she made for him, and the hardships Navarro had to go through to pay for his tuition.

"Thank you for being such a good and sweet son, for keeping your promise that you will graduate on this day," she told Yce.

She also acknowledged that raising their son was a collaborative effort between her and her longtime boyfriend, Jimmy Velasquez, with Navarro and his partner, Tanya Bautista.

"We have had our ups and downs and our imperfectly perfect family survived it all. I thank you," Lapus concluded.

In the photos, both Navarro and Lapus looked glowing as they posed with Yce, as well as his half-brother Frederick, who is the eldest son of the "It's Showtime" host.

Lapus and Navarro, who got married in 1998, first met on the set of "ASAP." They split shortly after Lapus gave birth to Yce, with Navarro filing for annulment in 2005.

You can check out their full messages for their son Yce below:

Vhong Navarro:
"Anak ang sarap ng pakiramdam na makita kang umaakyat sa stage. Iyang ngiti mo na 'yan triple ang saya na nararamdaman ko. Sabi ko naman sayo kayang-kaya mo. Mahal na mahal kita [Yce]! Proud na proud kami syo ng mommy [Bianca] kuya [Frederick] at tita [Tanya] mo. We love you!"

Bianca Lapus:
"I couldn't help but get teary eyed. You have been through a lot....sacrificed a lot....even shed tears and had sleepless nights studying....just for us to see you up on stage with your diploma. Your dad [Vhong] and i are so proud of you!

"I imagined when you graduated casa, grade school and now high school. The hard work of your dad to send you to a good school and the days when you and I would make your projects, your 1st communion, field trips, school program, intrams etc. I would bring you to school almost everyday since you were 4yo. We would panic when you get sick and have asthma attack.

"I remember very well your 1st day of school. You didn't want to let go of my hand and i had to stay outside the window where you can see me so you wont have to be afraid. Thank you for being such a good and sweet son, for keeping your promise that you will graduate on this day, we have had our ups and downs and our imperfectly perfect family survived it all.

"I thank you [Tanya] and [Jimmy] for our joint force parenting. But most especially to you Vhong for being a great father. I will never regret that part of my life you know."