However, her dad has denied knowledge of the nuptials between the two.
Bobby was quizzed on the wedding and told gossip website TMZ: "No, she didn't get married."
He added: "If she says she is. I don't know about it."
Bobbi and Nick hope to prove the sceptics wrong and plan to celebrate their commitment to one another for a second time with a big wedding later this year.
Bobbi previously said: "The criticism of our relationship only made us stronger. It lit a fire under our ass. We are officially married now but our wedding was just very low-key. But I can say that we're planning a big wedding later this year.
"It's going to be very royal, classic and beautiful - just a phenomenal ceremony. We're going for the full fairytale."
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