Pagination

Hello, can anyone help me with pagination?
How it must work: I need to count movies where one of the actor have acted in this movie.

i have 3 tables:

INSERT INTO `movies` (`id`, `title`, `year`) VALUES
(1, 'The Lorax', 2012),
(2, 'The test', 2013);
 
INSERT INTO `actors` (`actor_id`, `actor_name`) VALUES
(1, 'john ugu'),
(2, 'emily fun');
 
INSERT INTO `movieactors` (`movie_id`, `actor_id`) VALUES
(1, 1),
(2, 1),
(1, 2); 

Code (markup):

$page_query    = mysql_query("SELECT m.id, 
                GROUP_CONCAT(DISTINCT a.actor_name ORDER BY a.actor_name) AS actors 
                FROM movies m 
                INNER JOIN movieactors mg ON (mg.actor_id = m.id)
                INNER JOIN actors g ON (g.actor_id = mg.genre_id)
                INNER JOIN
                (
                SELECT actor_name FROM movieactors
                WHERE actor_name = '$actor_name'
                ) as act ON ma.actor_name = act.actor_name
                WHERE a.actor_name <> '$actor_name'
                GROUP BY m.id 
                ORDER BY COUNT(DISTINCT a.actor_name) DESC, m.id");
    $pages            = ceil(mysql_result($page_query, 0) / $MovieListPerPage);
    $page            = (isSet($_GET['page']) AND (int)$_GET['page'] > 0 ) ? (int)$_GET['page'] : 1;
    $start            = ($page - 1) * $MovieListPerPage;

Code (markup):

 

I don't understand your question. You need the count of movies where an actor has acted or where a specific actor has acted?