The 29-year-old actress, who is believed to have accepted Jeter's marriage proposal last year, has booked her ceremony at Oheka Castle in Long Island for November 5, according to the New York Post.
A reporter from the newspaper apparently spotted an entry in the official calendar at the palace reading "JETER wedding", leading to speculation that the couple will tie the knot there.
Kevin Jonas married Danielle Deleasa at the venue last year.
However, the castle's manager Rick Bellando denied the rumours, saying: "We wouldn't use his real name if it were [true]. When the Jonas brother got married here last month, we used a different name."