Robert Pattinson and fiancée FKA twigs are reportedly having differences over their wedding guest list.

According to Celeb Dirty Laundry, the "Pendulum" singer does not want to invite "Twilight" actress Nikki Reed, who was once close friends with her husband-to-be, to the upcoming ceremony.

An insider revealed that Pattinson's ex-girlfriend, Kristen Stewart, "came between" him and Reed, "ruining things for them."

"Now that Rob has a new partner, who Nikki is a huge fan of, Rob wants to be friends with Nikki again. He thinks she'll be a great supportive friend to twigs," the insider continued.

In an interview with Yahoo! Style last month, Reed expressed her admiration for FKA.

"I'm the biggest fan. I'm a true fan," she said. "It's so rad that she's with my co-star [Robert Pattinson] because I'm a true fan of her. I'm going to ask him if he can get an autograph for me."

Reed continued to say that she thought FKA was a great musician, and that no matter what, FKA remained an artist. 

Despite the positive words on Reed's part, CDL reported that since the "Video Girl" hitmaker is "jealous of the actress' history" with "The Rover" actor, she has banned Reed from the wedding. Meanwhile, Pattinson is supposedly considering inviting Stewart to the upcoming ceremony. Pattinson supposedly still has a soft spot for Stewart, as thetwo of them rose to fame together. 

A source insisted, via HollywoodLife.com, that the British actor holds no grudges against his ex-lover for cheating on him with her "Snow White and the Huntsman" director, Rupert Sanders.

"For Rob now, there's no bad blood," the source said. "He's moved on, and so has Kristen. It is time to look forward to the future."

In addition, Pattinson is reportedly inviting longtime pal Katy Perry to his wedding.

According to HollywoodLife.com, the pop star is already on the guest list, and she will have a big part in the couple's special day. 

"Katy absolutely adores Tahliah and is so happy for Rob," another source claimed. "She's never seen him happier."