In two Instagram posts, he thanked ABS-CBN bosses Cory Vidanes, Lauren Dyogi and Deo Edrinal, as well the Dreamscape team, for the warm welcome.
He also posted a photo with It's Showtime host Vice Ganda and said that he was "literally starstruck."
A former GMA 7 talent, Aljur fought a legal battle with the network in 2014. Having returned to GMA in 2016, his contract reportedly expired early this year.
Aljur's brother Vin Abrenica is also with the Kapamilya network where he stars in the late-afternoon drama "Wildflower."