There are strong claims that Megan Fox and Machine Gun Kelly have called it quits after the actress shared a cryptic post and deactivated her Instagram account. To add more fuel to the fire, the couple reportedly got into a "big fight" over the Super Bowl weekend, resulting in the actress wearing off their engagement ring.

This alleged brawl led to Fox's social media drama that sparked the breakup claims. But amid all these, there are rumors MGK cheated on her fiancée with the guitarist Sophie Lloyd.

A source told People Monday, February 13, that the two hadn't officially called off their engagement yet, but the "Jennifer's Body" star already took her ring off. As they already had some issues in the past, things seemed pretty serious this time.

After their alleged disagreement, the 36-year-old was upset about the singer and wouldn't even speak to him. Further, Us Weekly claimed the actress was set to attend her partner's performance at a Sports Illustrated party Saturday, February 11, but "canceled her plans" and left Arizona following their argument.

A different source told the publication that no one could sense something was wrong between the two, seeing MGK giving it all during his performance. He was even climbing rafters and exciting the crowd.

An insider confirmed to Page Six that Fox wasn't around during the event and didn't even grace the red carpet. However, the rocker seemed to hint there was something wrong between them when he dedicated "Bloody Valentine" to "the ladies" instead of the "Transformers" star and didn't sing their relationship song "Twin Flame."

Another tipster seemingly noticed and told Entertainment Tonight that MGK's "energy was low" while performing, though it was also revealed that he was with Fox during the Super Bowl weekend and "seemed fine."

MGK and Fox showed a united front when they went to Cash App and Visa's h.wood Homecoming Party, though it wasn't known if they watched the NFL championship game together.

The pair's breakup rumors come on the heels of Fox deactivating her Instagram account and deleting MGK's photos after sharing a cryptic post. She even responded to a fan who said Kelly probably got with Sophie, with "Maybe I got with Sophie."

Sophie is the British rock and metal guitarist who joined MGK's "Mainstream Sellout Tour" last year. But despite the claim between the two, the musician has been in a five-year relationship with Christopher Painter, aka The Painter, a drummer and sound engineer.