Bayilvan Ranganathan (born 19 March 1944) is an Indian actor, comedian, YouTuber, journalist and social media influencer who predominantly featured in comedy and villainous negative shade roles in Tamil films.

He was nicknamed as Bayilvan by former actor and chief minister of Tamil Nadu M. G. Ramachandran indicating his body posture, bodyweight and bulk physique.

[1] He then plied his trade as a henchman and sidekick to main villains acting in minor roles often portraying himself in negative shades.

[3] Shakeela queried on why Bayilvan was irked about the glamour and dressing sense of female actresses and in response, Bayilvan insisted that he only told what was happening in reality via his YouTube channel by referring to an example of Telugu actress Rashmika Mandanna's dressing patterns when attending celebrity events.

[13][14] He was the main subject and centre of attention in the infamous Suchi Leaks where popular singer and actress Suchithra lashed out against him for his derogatory remarks about film celebrities especially indicating his publicity stunt and cheap tactics to milk views for his YouTube videos.