Even if they were reported to have been engaged in April this year during the 2015 Coachella, there's no wedding date set yet for Robert Pattinson and FKA Twigs.

Now, the wedding might not even happen as the "Twilight" actor is said to be cheating on the British singer with actress Sienna Miller.

According to the latest report from Star Magazine, a shared by Inquistr, Robert Pattinson and Sienna Miller were "spending a lot of time hanging out in each other's trailers" and "often meet up for late-night pub runs."

"The cast and crew are picking up on the mutual attraction," the insider, who allegedly witnessed Robert Pattinson cheating on FKA Twigs, told Star.

The "G.I. Joe" actress and the "Twilight" actor are good friends. In fact, it was Sienna Miller and her partner Tom Sturridge who introduced Robert Pattinson to FKA Twigs.

"The insider tells us that Pattinson, Miller and Sturridge all went to see Twigs in concert," said E! News. "Pattinson loved her music and Miller and Sturridge introduced the two of them. And the rest is history!"

Robert Pattinson and FKA Twigs' wedding has become the subject of a lot of speculations as they have been reported to be having relationship problems since the engagement.

But Gossip Cop insisted that there's no truth to the rumor that Robert Pattinson and FKA Twigs' wedding are at risk because he's cheating.

"This entire account is made-up," the article said. "Gossip Cop has repeatedly called out Star in the past for creating false relationship problems between Pattinson and FKA Twigs. We previously corrected the magazine's report claiming Pattinson wanted the singer to tone down her sexy onstage persona. And, before that, Gossip Cop busted a rumor about the couple being in an open relationship."

Gossip Cop said that the latest claim that Robert Pattinson is cheating with Sienna Miller is "nonsense," and the wedding to FKA Twigs are still very much on the table.