Dave Grohl's family is expanding. 

An insider tells "Us Weekly" the Foo Fighters frontman and his wife Jordyn Blum are expecting their third daughter together. 

The couple, who wed back in 2003, are already parents to eight-year-old Violet and five-year-old Harper.  Grohl has talked a lot about passing on his love of rock music in general and the Beatles in particular to his daughters. 

During the recent Beatles tribute "The Night That Changed America," he told the crowd he was proud to say the Fab Four are his mom's favorite, his favorite, and now his daughter's favorite.

Photo Credit Getty Images