Re-direct www. to https

Hi,

When I type in www. in my navigation bar it does not re-direct to https, I must click on a link on my website in order for it to re-direct. I would like to force a re-direct of www. to https. This way no one can access my website not using https by changing the url in the navigation bar.

Thanks!

http://wordpress.org/extend/plugins/wordpress-https/