def actor(request, content_type_id, object_id):
    """
    ``Actor`` focused activity stream for actor defined by ``content_type_id``,
    ``object_id``.
    """
    ctype = get_object_or_404(ContentType, pk=content_type_id)
    instance = get_object_or_404(ctype.model_class(), pk=object_id)
    return render(
        request,
        'actstream/actor.html',
        {
            'action_list': models.actor_stream(instance),
            'actor': instance,
            'ctype': ctype
        }
    )