Help!

My two year old has been getting up at 5 am ever morning and won’t go back down.

He won’t settle in our bed because he gets too excited, and if we put him back in his room he just screams until we go get him it he just comes back to our room on his own.

Doesn’t matter what time he goes down at night.

But he always gets up at 5, and then is clearly tired and cranky. But he won’t go back down.

Any advice??