ET has learned that the Riverdale star and the photographer broke up about a month ago but remain friends. E! News was first to report the news.
Mendes has since deleted all photos of him on her Instagram. She is also not following him anymore. He is still following her. The actress made their relationship Instagram official in September, posting a PDA pic of the two.
"That long distance kind of love," she captioned a shot kissing Vaughan in front of a private plane. Back in September, Mendes headed back to Canada to film the new season of Riverdale, in which she portrays Veronica Lodge.
In February, Mendes posted stunning photos that her then-beau took of her. "Last light in LA" @graysonvaughan," she captioned one.