Miley Cyrus is making music with her new boyfriend Justin Gaston - the pair has been writing songs together, according to the star's dad Billy Ray.

The Hannah Montana star, 15, started dating the 20-year-old underwear model and aspiring rocker earlier this year - and he is now helping her pen new tracks.

Country singer Billy Ray Cyrus tells Usmagazine.com, "I'll tell you what - they are great friends, and they make a good team?They write a lot of songs together, and they sing - it's incredible."