《蠢蛋搞怪秀4.5坏外公》上映于2014年，是由未知执导，约翰尼·诺克斯维尔领衔主演的电影。

2014Bad Grandpa .5 gives you a whole new perspective on the world of Irving Zisman with bonus scenes and pranks also featuring Spike Jonze as "Gloria" and Catherine Keener as Irving's wife "Ellie", plus a look at the evolution of Johnny Knoxville's naughty alter-ego, the makeup effects,