Jennylyn Mercado's son Jazz celebrates 13th birthday with We Bare Bears-themed party

Jennylyn Mercado's son Alex Jazz celebrated his 13th birthday on Monday.

On Instagram, Jennylyn shared a series of photos from the birthday boy's "We Bare Bears"-inspired party. Her partner Dennis Trillo and his son Calix were also present.

"My Jazz is now officially a teenager! Pero he will remain my baby boy forever! Happy 13th, my Jazzy! I love you so much!" she wrote in the caption.

In the comments section, celebrities including Katrina Halili, Shaira Diaz, Angel Locsin, Fifth Solomon, and Chynna Ortalalso also showered him with birthday greetings.

Earlier Monday, Jennylyn also greeted her son with a simple happy birthday and shared some of their photos together.

Alex Jazz is Jennylyn's son with actor Patrick Garcia while Calix is Dennis' son with former beauty queen Carlene Aguilar.

—Franchesca Viernes/MGP, GMA News