Can't register my jQuery script in WordPress

For some reason my jQuery script is not being registered, I believe I am doing it correctly but maybe I'm missing something. Here's my code:

/*registering script*/
    function register_my_script(){
        wp_register_script('alliance_script', get_template_directory_uri() . '/js/script.js');
    }
    add_action('enqueue_scripts', 'register_my_script');