Elmo is a puppet character on children's TV show Sesame Street. He is a hairy red monster with a falsetto voice. He presided over children for 15 minutes (five minutes after 2017) on Sesame Street of "Elmo's world". He's often a figure of Kevin clash. After clash resigned in late 2012, he was faked by Ryan Dillon.

Elmo called himself three and a half years old, and his birthday was February 3. Elmo's characteristic is to avoid using pronouns to refer to himself, rather than using the third person himself (for example, "Elmo wants this" rather than "I want this"). Nancy sans, a staff writer at Sesame Street, once described Elmo's origins: "there is an extra red puppet around, and actors sometimes pick him up and try to create a personality, but it doesn't seem to come true."

Originally known as "short red," the puppet was performed by Jerry Nelson in the early 1980s, Brian muehl from 1980 to 1984, and Richard hunt from 1984 to 1985. But, in 1985, Richard hunt was frustrated that he and the puppet huddled together and threw them to Kevin clash, who later performed Elmo. He said Elmo should be a good and loving character. Sans continued: "one day in 1985, talented puppeteer Kevin clash brought him up and gave Elmo energy and life. From that day on, we will all write for Elmo. Kevin's performance inspired the writer's development of Elmo's role. ". John Tartaglia, Matt Vogel and Jim Martin are all secondary performers in the role, providing movement for Elmo's arms and legs, especially in green screen shots.

Elmo and Cookie Monster appear at the furchester Hotel, where he will stay for a long time due to his fascination with the furchester hotel. His father, Louis, was brother to funella furchester.

Sesame Street fans complain that Elmo's prominence has led to a significant reduction in the roles of some older characters, such as Oscar the grouch, big bird, count von count, prairie dawn, Grover and cookie monster. Some fans also accused Elmo of causing Kermit the frog to leave Sesame Street permanently. Sesame Street traditionalists refer to Elmo as the "little red threat.".

In its FAQ, sesame studio resolved Elmo's accusation of mentioning himself in the third person, pointing out that the behavior "mimics the behavior of many pre-school children. Like a 3-year-old, he doesn't always "have the skills or knowledge to speak the right English."