add_action( 'genesis_after_sidebar_widget_area', 'sk_show_cpt_same_cat' );
function sk_show_cpt_same_cat() {
    if ( ! is_singular( 'post' ) ) {
        return;
    }

    $categories = get_the_category();

    $cat_slugs = '';

    foreach( $categories as $category ) { // concatenate
        $cat_slugs .= ',' . $category->category_nicename;
    }

    echo '<section class="widget"><div class="widget-wrap">';

    // WP_Query arguments
    $args = array (
        'post_type'              => 'movies',
        'category_name'          => $cat_slugs,
        'posts_per_page'         => '2',
    );

    // The Query
    $query = new WP_Query( $args );

    // The Loop
    if ( $query->have_posts() ) {
        echo '<ul>';
        while ( $query->have_posts() ) {
            $query->the_post();
            // do something
            ?>
            <!-- Display the Title as a link to the Post's permalink. -->
            <li>
                <a href="<?php the_permalink(); ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a>
            </li>
    <?php
        }
        echo '</ul>';
    } else {
        // no posts found
    }

    // Restore original Post Data
    wp_reset_postdata();

    echo '</div></section>';
}