The Adventures of Elmo in Grouchland (or simply Elmo in Grouchland) is a 1999 American musical adventure comedy film directed by Gary Halvorson (in his feature directorial debut) from a screenplay written by Mitchell Kriegman and Joey Mazzarino, based on a story conceived by Kriegman. This was the second of the two theatrical feature films to be based on the children's television series Sesame Street, after Sesame Street Presents: Follow That Bird in 1985. It stars Mandy Patinkin and Vanessa Williams alongside Muppet performers Kevin Clash, Caroll Spinney, Steve Whitmire, and Frank Oz. It features songs written by a wide range of songwriters, including Siedah Garrett, Jeff Elmassian, Andy Rehfeldt, Martin Erskine, Seth Friedman, and Michael & Patty Silversher, with a score composed and conducted by John Debney.

Plot

One day, Elmo plays with his blanket in his bedroom in his apartment. He spills orange juice on his blanket and takes it to the laundromat. Afterward, he runs into his friend Zoe, who is feeling upset, so Elmo tries to cheer her up. Zoe wants to hold the blanket, but Elmo does not consent to sharing it, resulting in a tug of war that causes it to rip. Enraged, Elmo declares to Zoe that she is not his friend anymore. Telly Monster, roller skating out of control, comes and accidentally swipes the blanket, leading to a chase around Sesame Street. The blanket ends up falling into the hands of Oscar the Grouch, who sneezes on it and drops it in his trash can. Unwilling to wait for Oscar to return, Elmo dives into the bottom of the trash can, where he finds his blanket snagged on a door.