Miley Cyrus: Pushing for a Baby Liam Hemsworth?!?

Miley Cyrus has a new hair color and a new tattoo.

But sources say the 19-year old is pushing for one more new addition to her life: A BABY!

"Miley and Liam really want to have a baby quickly," a Cyrus family source tells Us Weekly of the engaged couple.

And while the respective ages of the two involved may give most readers pause, this insider swears "both mature and ready for this," adding: "Miley is 19 going on 40."

Still... what's the rush?!? What do you think of Miley and Liam becoming parents before the former is legally old enough to drink?