Stefon Meyers (né Zolesky) is a fictional character portrayed by Bill Hader on the American sketch-comedy television show Saturday Night Live (SNL). Created by Hader and writer John Mulaney, Stefon is based on people Hader and Mulaney encountered in their daily lives, including a club promoter and a barista. Stefon first appeared in the sketch "Movie Pitch with Stefon" on the November 1, 2008, episode hosted by Ben Affleck, later becoming a recurring character on Weekend Update from 2010 until 2013.

Stefon is described as a "city correspondent"; when asked about recommendations for events and destinations in New York City, Stefon suggests unusual nightclubs and parties with bizarre characters and themes. The character is also shown to be infatuated with the Weekend Update anchor, Seth Meyers, and in his final appearance as a recurring character, the two proclaimed their love for each other. Because lines for Weekend Update are read from cue cards, Mulaney constantly changed the script prior to the live broadcast to make Hader break character.

Widely regarded as Hader's most memorable character on Saturday Night Live, Stefon has become a fan favorite and has made multiple guest appearances since Hader left the show; however, the character has also been criticized due to his stereotypical nature.

Stefon was created by American sketch-comedy television show Saturday Night Live (SNL) cast member Bill Hader and writer John Mulaney. The character was inspired by people Hader and Mulaney had encountered in their daily lives; these include a club promoter who sent Mulaney an e-mail about a club that "had everything", including "rooms full of broken glass" as a highlight. His voice and mannerisms are based on those of a barista at a Chelsea, Manhattan, coffee shop Hader frequented. Mulaney took inspiration for Stefon's look from 2000s club fashion and the 2003 film Party Monster. He chose an Ed Hardy shirt because he assumed it would look like the fashion from the film.

Stefon was originally written for a sketch for the November 1, 2008, SNL episode hosted by Ben Affleck. In the sketch, Stefon and Affleck's character, David Zolesky, were pitching a film to a studio. It was well received, leading Hader and Mulaney to write a similar sketch featuring Stefon when Bradley Cooper hosted the show. The reception for the new sketch was more adverse when it played at dress rehearsal. This made them feel that the character was not working, with Mulaney remarking that there were too many individuals for a skit centered on a single character. Doug Abeles, the head writer of Saturday Night Live's satirical news segment Weekend Update, suggested that the character should be introduced as a correspondent on the feature instead. During production of the character's first appearance on Weekend Update, Mulaney assumed the character would be cut after rehearsal, but Stefon was positively received and was invited to reappear two shows later.

Hader and Mulaney together created the character's idiosyncratic manner, including his exuberant descriptions of fictional nightclubs. They wrote long scripts so SNL head writer and Weekend Update anchor Seth Meyers could pick which jokes to include. Mulaney said that the eventual format of Stefon's club recommendations was inspired by how the character proposed his ideas in the initial 2008 skit. Hader described his role in the writing process for the character as an "editor" and would pitch parts that included odd voices. Mulaney left SNL in 2012 but periodically returned to write the character's lines.

After the dress rehearsal for Stefon's first appearance on Weekend Update, a line from the script had to be changed because it received no response. As the lines for Weekend Update are read from cue cards, Hader, who was unaware of the change during the show, broke character. Mulaney was amused by this and decided to continue to change the script before the live broadcast to make Hader laugh. To make sure Hader did not stumble on his lines, Mulaney would tell him the new jokes shortly before he entered the set. Mulaney characterized getting Hader to crack as a "group effort", adding that cast member Andy Samberg would stand near the camera, cross his hands, and look at Hader, tempting him to laugh. Hader also attributed his frequent corpsing as Stefon to the character's animated personality, which made him immerse himself in the role and lose his composure. Despite Stefon's popularity among fans, Hader felt pressure while portraying the role, as he often struggled to stay in character.

Due to Hader leaving SNL at the end of the 2012–2013 season, he and Mulaney arranged plans for Stefon's final appearance. Hader had written notes the year prior for it to be a prerecorded sketch where Meyers interrupts Stefon's wedding with journalist Anderson Cooper, similar to the 1967 film The Graduate. The idea was not enthusiastically received by the staff, including SNL creator and producer Lorne Michaels, due to them believing that Stefon worked better as a live sketch. Meyers instead recommended that Stefon appear on Weekend Update as usual before the character flees, followed by the original skit for a sense of surprise. Another suggestion for Stefon's final appearance was for him to board a spaceship and return to his home planet with his boyfriend, but this was abandoned in favor of the initial idea. Rhys Thomas directed the taped sketch, which was filmed on Tuesday before the show.