A source said that the couple broke up after two years of dating on and off.
"Pauly and Aubrey have split, for good this time," the insider shared. "Pauly was the one to end things."
The couple previously separated in May 2016 before reuniting one month later.
The pair met on reality series Famously Single in November 2015. The duo recently filmed the after-show for the series' current season in June and appeared to be together at the time.
Pauly D has since removed all photos of the former Danity Kane member from his Instagram account, save for a Famously Single cast photo. Neither currently follows the other on Instagram, and on Tuesday, O'Day uploaded a photo of herself with the caption, "voices in my head sayin' I could do better, damn."
Photo Credit: Twitter / @etnow