Topic: two controllers in one view in Rails

I have two controllers, one for the users and one for the microposts.

What I'm trying to do, is to put on the same view, the users informations and the microposts form.

The issue is the url of this page is so I have only access to the users controller.

I tried to do:

render :file => '/posts/new' but it doesn't work.

The only solution I found is to put everything on one controller but it will be a mess.

I really want a separate controllers for each.

So I don't know how to do this. Any idea?