Luke Lerdwichagul, also known online as SMG4 (formerly SuperMarioGlitchy4), is an Australian YouTuber, animator, director, producer, writer, editor, and voice actor. He is the founder and series director of the SMG4 YouTube channel, the co-founder and CCO of the animation studio Glitch Productions, the co-creator of the web series Meta Runner and Sunset Paradise, and an executive producer on Murder Drones and The Amazing Digital Circus. He is represented in videos as the aforementioned SMG4, a blue-and-white character resembling him and who was originally a Mario recolor and one of the two main protagonists of the bloopers, while Luke himself serves as one of the overarching protagonists. He is the younger brother of Kevin Lerdwichagul and the second-oldest brother of Max Lerdwichagul and Tish Lerdwichagul.