If rumour mills are to be believed, there seems to be a million problems confronting "Twilight" actor Robert Pattinson and his fiancée FKA Twigs.

The couple, who intend to get married in summer seem to be in the midst of misunderstandings. Or so, media reports allege. According to an article that appeared on Celeb Dirty Laundry, Pattinson and Twigs had a heated argument about inviting the former's ex, Kristen Stewart.

The webloid reported that Twigs is uncomfortable about an invitation extended to Kristen. "FKA Twigs [is] driving Robert Pattinson away by banning his ex-girlfriend from their wedding. It's furthermore alleged that forbidding a fiancé from inviting his ex-girlfriend to a wedding is definitely not a great start to any marriage," reported Gossip Cop (via Celeb Dirty Laundry)

However, several reports state the opposite. An insider told Gossip Cop that the wedding is definitely still on and the couple will, in fact, get married in the summer of 2016.

Pattinson and his fiancée are extremely low key and we might see the two tie the knot in a private ceremony. In the past, Twigs has said that she doesn't like a traditional wedding.

Her plans will most probably include a register wedding, a pub lunch and a small party for friends and family. The singer has also said that she will not wear a traditional white gown on her wedding day.

So far, Robert Pattinson and FKA Twigs haven't commented on the reports, and remain tight-lipped about their wedding date as well.