Meghan Markle’s estranged dad allegedly hid a secret stockpile of child porn among family mementos in his Philippines home, according to his son, who claims to have stumbled across the sickening stash.

Thomas Markle Sr.’s alleged trove of filth – which included“hundreds if not thousands” of vile snaps – was discovered by his son, Thomas Markle Jr., over the summer, The Sun reported on Thursday.

Markle Jr. told authorities that the images were chillingly hidden among family mementos in four boxes at his dad’s home in Cebu in July.

The Duchess’ half-brother had been searching for a phone when he claimed he uncovered a 15-minute video of child pornography on an LG mobile phone.

Children no older than age 10 or 11 were allegedly captured on the video.

There were also three images of naked and scantily-clad girls of about the same age on the device, according to The Sun.

One of the alleged images was a photo taken of the screen of a Lenovo ThinkPad laptop in a room Markle Jr. said he recognized from his dad’s ex-home in Rosarito, Mexico.

Markle Jr., 60, said he was a “shaking wreck” as he realized what he had stumbled upon before reporting the alleged discovery to the FBI hotline and state police in Pennsylvania — where Markle Snr., 82, was living at the time.

He also reported it to the National Center for Exploited and Missing Children.

Meghan Markle said Friday she’s “deeply disturbed” by the reports.