OMG I totally sympathise. I think our little ones may be in a 5am colt or something
My little girl is awake by 5-6am every day. You could nearly use her an an alarm clock. I have just been on the net today to try find a way I can get her to sleep longer.
I have decided that I'm just going to feed her when she wakes, change her than straight back to bed, and leave her there until she starts to cry, comfort her, leave her again, and hope that after a week or two she might find it easier just to stay asleep a little longer.
Keeping her awake any longer at night makes a difference with her. No matter what time she goes to bed and it's normally 7 at the very latest, she still wakes up at the same time every morning.
Good luck.