The 27-year-old performer, who picked out her wedding gown during a recent episode of TLC's Say Yes to The Dress, got engaged to her British boyfriend last February. Ferguson popped the question in San Francisco, California, two weeks after meeting King.
In July, ET caught up with King at the CMT Music Awards, where she dished on wedding plans and tattooing "Fergie" on her chest.
"It's not even a fake tattoo, it's real," King revealed of the large ink featuring a knife going through a heart. "He just got my name tattooed on the front of his neck, so it's fair."