Cookie Monster is a blue Muppet character on the PBS/HBO children's television show Sesame Street. He is best known for his voracious appetite and his famous eating catchphrases, such as "Me want cookie!" As his name suggests, his preferred food is cookies, though he eats almost anything, including inedible objects. Chocolate chip cookies are his favorite kind. His speech is often grammatically nonstandard; for example, he always uses "Me" to refer to himself in place of "I", "My", and "Mine". Despite his voracious appetite for cookies, Cookie Monster shows awareness of healthy eating habits for young children and also enjoys fruit and vegetables.
In a song in 2004, and later in an interview in 2017, Cookie Monster revealed his real name as "Sid," though in the first season he was referred to as both "tiny" and "Harry." He is known to have a mother, a younger sister, and a cousin, identical in design, who does not like cookies. All three share his characteristic blue fur and "googly eyes". He also has a father, who appeared in a Monsterpiece Theater sketch promoting energy conservation, water conservation and environmentalism.