Oh, I don't want to say this but... My ds started doing that at around that age and is still doing it now. He's 2 years and 8 months. Somedays, if we are lucky we can stretch him to 5:30.
We tried everything,putting him to bed later didn't work at all, he would just be super tired.
Over time I have just had to adjust my sleeping pattern so I manage to sleep. It kinda sucks but, I'm hoping he'll grow out of it eventually.

I really hope your ds isn't the same as mine! Xxx