jQuery: How to call a jQuery plugin function on an element that hasn't yet been added to the DOM?

I have a jQuery plugin that I am using:

$(document).ready(function(){
    $('.elements').fancyPlugin();
});

This works great until I start adding new elements:

$.get('ajax.html', function(data){
    $('#container').html(data);
});

I could call the plugin function again like this:

$.get('ajax.html', function(data){
    $('#container').html(data).find('.elements').fancyPlugin();
});

...except that the AJAX is happening inside another jQuery plugin that shouldn't have to know about the fancyPlugin().

How can I apply this plugin to all current and future elements?