Robert Pattinson's rumoured girlfriend English singer FKA Twigs posted a cryptic message on Twitter, sparking rumours that she was pregnant.

The 26-year-old singer, whose real name is Tahliah Debrett Barnett, tweeted:

However, a source close to the couple, told Hollywood Life that there is no truth to the story.

"Rob has not got anyone pregnant. Whatever that tweet or rumor is about is basically just that, a big rumor!" the insider said.

The 28-year-old actor and Twigs were spotted together last month in New York City with friend Tom Sturridge, sparking rumours that the two are dating.

Robert Pattinson and FKA Twigs
Robert Pattinson and FKA Twigs taking a stroll in the East village on August 27, 2014 in New York City. Getty

"It's the real deal between Rob and Tahliah," a source told the Sun newspaper at that time. "They had been able to keep their relationship secret until recently, but they're already smitten."

"He's been taking her on dates for the last month or so, and has even flown her out to stay with him in New York. He also loves going to her gigs," the insider added.

If rumours are true, Twigs will be Pattinson's first serious girlfriend since splitting with Twilight co-star Kristen Stewart.

Pattinson ended his four-year relationship with Stewart, after it was revealed that she cheated on him with married British director Rupert Sanders.

The 24-year-old and the father-of-two worked together on Snow White and The Huntsman.