Did Machine Gun Kelly put a ring on it?

The rapper, 30, is sparking engagement rumors after his girlfriend Megan Fox, 34, was seen sporting a massive ring on her left hand. According to Page Six, the couple was photographed heading back to their hotel in New York on Thursday (Jan. 28) ahead of MGK’s “Saturday Night Live” performance this weekend.

The engagement wouldn’t come as a complete surprise. The two, who met while filming Midnight in the Switchgrass in Puerto Rico, were first seen together in May. They haven’t been shy to show PDA on social media and in MGK’s steamy video for “Bloody Valentine” following Fox’s split from husband Brian Austin Green.

During a joint interview with the “Give Them Lala … With Randall” podcast last year, they opened up about their romance.

“I knew right away that he was what I call a twin flame,” said Fox, while Kelly said he was anxious to “catch one glimpse of eye contact” with his co-star outside of his trailer. “I would just sit there and hope.”

In July, the couple made it Instagram official when they shared a selfie together. “waited for eternity to find you again …” MGK captioned the photo.

MGK and Fox have not commented on the speculation. This would be the first marriage for Kelly, who has a 12-year-old daughter from a previous relationship. Fox and Green, who were married for nearly a decade, share three sons–ages 4,6, and 8.