Katy Perry
Katy Perry will play a significant role at Robert Pattinson and FKA twigs' wedding. Getty Images

American singer/songwriter Katy Perry will reportedly attend close friend and Twilight heartthrob Robert Pattinson's wedding to girlfriend FKA twigs.

It was previously reported that the Remember Me actor and the 26-year-old singer, whose real name is Tahliah Debrett Barnett got engaged last week.

According to a report in Hollywood Life, the Roar hitmaker will have an important role in Pattinson's nuptials.

"Yes, for sure she's been invited to the wedding, she will actually play a significant role at their ceremony," a source said.

"Katy absolutely adores Tahliah and is so happy for Rob. She's never seen him happier," the insider added.

It was earlier reported that Pattinson is planning to invite former girlfriend American actress Kristen Stewart to his wedding.

In 2012, the 28-year-old British actor ended his relationship with Stewart, after it was confirmed that she cheated on him with her Snow White And The Huntsman director Rupert Sanders.

The 24-year-old Camp X-Ray star and Sanders were photographed kissing in the Hollywood hills.

Meanwhile, Pattinson and Katy Perry had sparked dating rumours, after the two were reportedly spotted getting cosy at The Rover after-party.

However, in an interview with Elle UK, the Teenage Dream singer offered evidence that there is nothing romantic between them.

"Okay, so here's the proof there was never anything going on with me and Robert Pattinson," she told the magazine. "I fart in front of him. Properly fart. And I never, ever fart in front of a man I am dating. That's a rule."