The actress' fiery 'do stood out during her NYC adventures with her fiancé.
In addition to her stand-out hair, Fox sported a black-and-white polka dot dress and platform shoes. MGK, meanwhile, opted for a light-colored tank and metallic pants as he walked with his arm around Fox's shoulders.
The duo was also photographed in New York City on Tuesday. Fox kept her fiery red haircut for that outing as well, pairing it with a gray blazer dress and over-the-knee boots. For his part, MGK, 33, wore a matching denim puffer coat and pants along with a striped shirt.
The pair, who both wore sunglasses, held hands as they walked the streets of Tribeca.
"Everything between Megan and Machine Gun Kelly has been great lately. They're in a really good place in their relationship and have worked to get things back on track," the source said. "They are fully back together and enjoying it. They are talking about their future plans and about moving forward with their engagement and wedding planning."