Is Miley Cyrus pregnant? Billy Ray Cyrus further fanned the rumors when he tweeted that he's going to be a grandfather.

On March 6, country music star Billy Ray Cyrus took to Twitter to write, "I'm going to be a grandfather. Call me Papaw !"

Life & Style magazine had run a cover story of Miley Cyrus being pregnant and entering rehab last year. The "Wrecking Ball" singer responded by posting the magazine cover on her Instagram with the caption, "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."

According to Hollywood Life, there's no truth to Miley Cyrus baby bump rumors.

"She is at the height of her career and isn't ready for a baby. I don't think she would even know who the father is, since she has been so promiscuous," the source said.

That was before she dated Patrick Schwarzenegger.

"Miley is definitely not pregnant," the source told Hollywood Life. "She takes the proper precautions for that not to happen, she is very smart about things when it comes to that and is not going to have a kid especially around this high point in her career."

But what about Billy Ray Cyrus' Twitter confirmation that Miley Cyrus is pregnant?

E! News said that he was just joking.

"E! News learns from a source that Billy Ray is not actually expecting a grandchild. He was just poking fun at the ongoing pregnancy rumors surrounding Miley," the report said.

Miley Cyrus is also poking fun at the baby bump rumors when she posted on Instagram a photo of her lying on the hospital bed and getting an ultrasound. She captioned the image, The rumors are true...... @cheythom