function bp_get_activity_secondary_avatar( $args = '' ) {
		global $activities_template;

		$r = wp_parse_args( $args, array(
			'alt'        => '',
			'type'       => 'thumb',
			'width'      => 20,
			'height'     => 20,
			'class'      => 'avatar',
			'link_class' => '',
			'linked'     => true,
			'email'      => false
		) );
		extract( $r, EXTR_SKIP );

		// Set item_id and object (default to user).
		switch ( $activities_template->activity->component ) {
			case 'groups' :
				if ( bp_disable_group_avatar_uploads() ) {
					return false;
				}

				$object  = 'group';
				$item_id = $activities_template->activity->item_id;
				$link    = '';
				$name    = '';

				// Only if groups is active.
				if ( bp_is_active( 'groups' ) ) {
					$group = groups_get_group( $item_id );
					$link  = bp_get_group_permalink( $group );
					$name  = $group->name;
				}

				if ( empty( $alt ) ) {
					$alt = __( 'Group logo', 'buddypress' );

					if ( ! empty( $name ) ) {
						$alt = sprintf( __( 'Group logo of %s', 'buddypress' ), $name );
					}
				}

				break;
			case 'blogs' :
				$object  = 'blog';
				$item_id = $activities_template->activity->item_id;
				$link    = home_url();

				if ( empty( $alt ) ) {
					$alt = sprintf( __( 'Profile picture of the author of the site %s', 'buddypress' ), get_blog_option( $item_id, 'blogname' ) );
				}

				break;
			case 'friends' :
				$object  = 'user';
				$item_id = $activities_template->activity->secondary_item_id;
				$link    = bp_core_get_userlink( $item_id, false, true );

				if ( empty( $alt ) ) {
					$alt = sprintf( __( 'Profile picture of %s', 'buddypress' ), bp_core_get_user_displayname( $activities_template->activity->secondary_item_id ) );
				}

				break;
			default :
				$object  = 'user';
				$item_id = $activities_template->activity->user_id;
				$email   = $activities_template->activity->user_email;
				$link    = bp_core_get_userlink( $item_id, false, true );

				if ( empty( $alt ) ) {
					$alt = sprintf( __( 'Profile picture of %s', 'buddypress' ), $activities_template->activity->display_name );
				}

				break;
		}

		/**
		 * Filters the activity secondary avatar object based on current activity item component.
		 *
		 * This is a variable filter dependent on the component used. Possible hooks are
		 * bp_get_activity_secondary_avatar_object_blog, bp_get_activity_secondary_avatar_object_group,
		 * and bp_get_activity_secondary_avatar_object_user.
		 *
		 * @since 1.2.10
		 *
		 * @param string $object Component being displayed.
		 */
		$object  = apply_filters( 'bp_get_activity_secondary_avatar_object_' . $activities_template->activity->component, $object );

		/**
		 * Filters the activity secondary avatar item ID.
		 *
		 * @since 1.2.10
		 *
		 * @param int $item_id ID for the secondary avatar item.
		 */
		$item_id = apply_filters( 'bp_get_activity_secondary_avatar_item_id', $item_id );

		// If we have no item_id or object, there is no avatar to display.
		if ( empty( $item_id ) || empty( $object ) ) {
			return false;
		}

		// Get the avatar.
		$avatar = bp_core_fetch_avatar( array(
			'item_id' => $item_id,
			'object'  => $object,
			'type'    => $type,
			'alt'     => $alt,
			'class'   => $class,
			'width'   => $width,
			'height'  => $height,
			'email'   => $email
		) );

		if ( !empty( $linked ) ) {

			/**
			 * Filters the secondary avatar link for current activity.
			 *
			 * @since 1.7.0
			 *
			 * @param string $link      Link to wrap the avatar image in.
			 * @param string $component Activity component being acted on.
			 */
			$link = apply_filters( 'bp_get_activity_secondary_avatar_link', $link, $activities_template->activity->component );

			/**
			 * Filters the determined avatar for the secondary activity item.
			 *
			 * @since 1.2.10
			 *
			 * @param string $avatar Formatted HTML <img> element, or raw avatar URL.
			 */
			$avatar = apply_filters( 'bp_get_activity_secondary_avatar', $avatar );

			return sprintf( '<a href="%s" class="%s">%s</a>',
				$link,
				$link_class,
				$avatar
			);
		}

		/** This filter is documented in bp-activity/bp-activity-template.php */
		return apply_filters( 'bp_get_activity_secondary_avatar', $avatar );
	}