Both have been posting about their recent trip in Australia.
Three days ago, Aquino shared on his Instagram account a photo of him in front of the Sydney Opera House in Sydney, New South Wales, Australia.
Fans thought that the 32-year-old actor was alone on the trip until he posted a photo of Panganiban.
Aside from the photo, a video was also shared on his Instagram story where he was talking with Panganiban while they were eating.
“Sinong nagpumilit na mag Melbourne?” Aquino asked Panganiban.
“Si Andoy,” the Kapamilya actress answered, referring to their friend, director Andoy Ranay.
In the video, Aquino tagged two Instagram users with account handles @andoyranay and @luinapolidg.
Panganiban, on her Instagram stories on Sunday, shared videos of international singer Ed Sheeran’s concert in Melbourne, Australia.
A street art photo was also shared by the 31-year-old actress on her Instagram story taken at Hosier Lane in Melbourne.
As they have been frequently seen together, fans are speculating that both stars might be dating again.
The two were in a relationship in their teens but broke up in 2006. Although they dated other people, both continued to be friends.
To recall, Panganiban ended her relationship with Kapamilya actor John Lloyd Cruz in 2016.
Aquino, for his part, had already split with his longtime girlfriend Kristine Nieto.