Character
Dennis Reynolds
Dennis Reynolds in It's Always Sunny in Philadelphia (2005), played by Glenn Howerton.
Dennis Reynolds co-owns Paddy's Pub with his sister and their friends, and he is convinced he is the smartest, most attractive man in any room he enters. He preens before mirrors, holds forth on seduction as if it were a hard science, and treats every conversation as an opportunity to demonstrate his own superiority. Something underneath the polish already feels slightly wrong.
Glenn Howerton plays vanity like a live wire, snapping from oily charm to sudden fury without warning, so a scene can turn on a syllable. The writing keeps handing him grandiose self-mythology to deliver with total sincerity, and it's that unblinking commitment to his own delusion that makes Dennis so funny and, in flashes, genuinely alarming to watch.