Miley Cyrus pregnant: Singer responds to reports on Instagram

American singer/actress Miley Cyrus has responded to an American tabloid's claims that she is pregnant with boyfriend Patrick Schwarzenegger's child.

Life & Style had claimed that the former Disney actress is expecting a baby and has given up drinking and smoking pot since sometime.

"Her period is late," a friend told the publication, via The Hollywood Gossip.

"Miley gave up drinking and smoking pot for a few weeks because of it, but she's having a hard time saying 'No.' Some people believe that she'd need professional help to stay sober for nine months," the insider added.

Cyrus took to her Instagram to respond to pregnancy rumours.

"those 3 days I was off Instagram I got pregnant and went to rehab. I was am super busy sorry guys. I know how much you missed my edits," she wrote.

Following weeks of speculation, Cyrus went public with her romance with the 21-year-old son of Arnold Schwarzenegger and Maria Shriver during the USC Trojans football game against the California Golden Bears by putting on a very passionate display.

Cyrus and Patrick kissed and cuddled in full view of hundreds of spectators at the Los Angeles Memorial Coliseum.

Patrick has previously talked about the Wrecking Ball singer.

"My eye, though, is set on Miley," he told Details magazine in 2011.