Robert Pattinson and FKA twigs
Robert Pattinson and FKA twigs are planning to tie the knot in London this summerReuters

Robert Pattinson reportedly wants to invite his former girlfriend, American actress Kristen Stewart to his wedding and FKA twigs is upset about it.

It was previously reported that the 28-year-old Remember Me actor and the 27-year-old singer, whose real name is Tahliah Debrett Barnett, are reportedly planning to tie the knot in a low-key ceremony in London this summer.

According to Life & Style magazine, Pattinson wants to invite the 25-year-old Clouds of Sils Maria actress as she was a "huge part of his life for so long".

"Things were great until they were going over the guest list, and Rob dropped the bomb about Kristen," a source said. "Twigs couldn't believe it and told him absolutely not. She was flipping out, and they got into a huge fight."

"Rob thinks Twigs may be overreacting, but he definitely put a damper on their wedding plans and now he's desperately trying to resolve the situation," the insider added.

In 2012, Pattinson ended his relationship with Stewart, who was his Twilight co-star and girlfriend of four years, after it was confirmed that she cheated on him with British director Rupert Sanders.

Stewart and Sanders, who worked together on Snow White And The Huntsman, were photographed kissing in Hollywood Hills.

The pair had patched up their differences and started dating again, and were spotted together during the Coachella Music Festival in 2013.

However, the two broke up in May 2013 after Pattinson pulled out of his 27th birthday celebrations, which had been planned by Stewart.