Can I duplicate an existing site to a new one on a multisite setup

Hi,

I would like to completely duplicate an existing site and create a new one with a different domain, (long story - thats what they want to do).

Everything is to be the same for now in terms of content. I have seen a few things and plugins around this topic but want to triple check so I dont mess it up.

As always, much appreciated.

Thanks!

Richard C