Robert Pattinson and FKA Twigs are allegedly engaged! The couple, who are only dating for five months, are rumored to be tying the knot soon. As the report bewildered the online realm, many are asking, how will Rpatzz's ex-lover Kristen Stewart react to the news?

The engagement news of Robert Pattinson and FKA Twigs came as a surprise to both fans and showbiz insiders alike. According to New York Post's Page Six, the news spread after rapper T-Pain announced the couple's alleged engagement during an interview with Vulture.

"FKA Twigs, she's one of my favorite artists right now," the rapper told Dee Lockett when asked about his musical inspirations. He then continued, "Well, the first time we even met each other, we met in the studio. Her music's changed a lot since then. But she's on tour so much, and anytime I call her, she's in a different place. And she's engaged now, so that's about to be a whole other thing."

T-Pain's response took Lockett by surprise, so he asked if FKA Twigs is really engaged, which the rapper confirmed by another statement.

"Yeah, to ol' Patty [Robert Pattinson]. I don't know if she wanted anybody to know that ..." T-Pain responded.

Robert Pattinson and 27-year-old FKA Twigs went public about their relationship in September. And early in March, E! News revealed that the 28-year-old "Twilight" star had given her a ring, which was meant to serve as a promise ring. But sources close to the couple said an engagement wasn't too far off.

While the engagement is a happy news for all Robert Pattinson and FKA Twigs' fans, it is a sad one for the actor's 24-year-old ex-lover, Kristen Stewart. As it came as quite a shock to fans, it was even more a devastation to K-Stew.

"When Kristen first heard that Rob and FKA Twigs were engaged, she felt devastated," a source exclusively told Hollywood Life. "She didn't want to believe it's true and was seriously hoping that it was just some sort of April Fool's joke."

Meanwhile, T-Pain tried to clarify his statement during the interview on Twitter and Instagram, claiming it was just an April Fool's Day prank, Huffington Post reported.

"Added a little #AprilFools to my interview with vulturemag today. Check it out!!!!" he wrote on Twitter before sharing an image on Instagram.

Even if the reps for both Robert Pattinson and FKA Twigs are yet to either confirm or deny the engagement, the Daily Mail said that People later confirmed news citing two sources.

"They are very much in love," an insider shared. "She helped him stop drinking and partying. He is really happy and they are inseparable."

As Robert Pattinson is officially off the market after his engagement to FKA Twigs, Kristen Stewart is extremely hurt. As explained by the Hollywood Life source, hearing the news has really taken a blow to K-Stew's confidence.

"She can't believe Rob would propose to FKA. She and Rob dated for years!" the source explained. "Hearing this has really taken a blow to Kristen's confidence. She was holding out major hope that there wasn't any truth to their engagement."

After Kristen Stewart's infidelity to Robert Pattinson when they were still in a relationship, does she have the right to be devastated over RPattz and FKA Twigs' engagement?