my baby is going to be 3 months old in a week, and from the very first day that i got her she slept through the night, she goes to bed at about 11:30-about anywhere from 5:30-6:30 wants to have a quick poop and pee and then shes back in my bed sleeping till whenever i say it's time to wake up.
On rare occassions she will be up by 8 or so when she can hear other people awake in the house, other then that i'm usually the one waking her up.