“R.I.P Harry dog. Thanks for all of the memories, smiles and love,” the 19-year-old pop star Tweeted on Saturday, along with a photo of himself and the pooch. “We’re gonna miss you …”

The singer’s nearly 1.1 million Twitter followers were quick to send to well-wishes and support, prompting Nathan to offer his gratitude.

“Thanks for all of your lovely tweets :)” he later added. “Making me smile.”

Fortunately, Nathan will have help keeping his mind off the loss in coming weeks as he and bandmates Max George, Siva Kaneswaran, Jay McGuiness and Tom Parker are preparing for the impending release of their third album, “Third Strike” – slated for release on March 1.

The album, which features hit singles “I Found You” and “Chasing the Sun,” will also contain collaborations with Pitbull, Chris Brown, LMFAO and Rita Ora.