Any suggestions on how to get my 11.5 mo to sleep past 5am?

she goes to sleep around 7 or so, and even when i put her down later, she's still up like clockwork around 5-5:15am. i've recently tried giving her milk in the crib, to buy myself an extra few minutes and with the hope she'll go back to sleep, but no luck. we have a few soft toys in there too. what can i do? even to get her until 6a would be amazing!