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There have been several pregnancy rumors floating around about Miley Cyrus and her boyfriend Patrick Schwarzenegger ... and the singer and her dad are responding by laughing them off. 

Miley posted a photoshopped photo of a pregnant woman getting an ultrasound, replacing the real mom-to-be's head with her own, and as for the baby on the screen -- it's a pizza baby! What else.

The photo was accompanied by the caption, "The rumors are true...... @cheythom."

The rumors are true...... @cheythom 🍕👶

A photo posted by Miley Cyrus (@mileycyrus) on

Meanwhile, Billy Ray Cyrus found Miley's Instagram pic hilarious, and decided to have a little fun with it himself! On Twitter, the country star re-posted the photo and added, "I'm going to be a grandfather. Call me Papaw!" and "Yep... Papaw Cyrus."

Photo: Getty Images