Former Bachelor Jason Mesnick and his fiancée, Molly Malaney, have agreed to tie the knot on TV in a two-hour special airing March 8, but according to a friend, the couple are already fighting over the guest list. According to an insider, ABC wants to turn the wedding into a Bachelor reunion, with Melissa Rycroft, 26 — Jason’s first choice, who he dumped for Molly — and former Bachelorette DeAnna Pappas expected to be in attendance. But Molly, 25, isn’t happy about inviting Jason’s former girlfriends! “ABC is basically controlling the guest list, and they’re inviting former Bachelors that Molly and Jason don’t even know,” the insider says. “Molly is fine with that, but she’s not especially thrilled about Melissa attending her wedding, because she thinks it will turn into a circus.” DeAnna, who rejected Jason, 33, during her season as Bachelorette, tells In Touch that despite Molly’s concerns, she’s looking forward to the bash. “I’ll be there with my boyfriend, Stephen,” she says. “I am so happy that Jason found Molly, as they really are the perfect couple.”