At 43 years old, Mikey Day has this physical status:
Day began his career with the Groundlings, a Los Angeles-based improvisational theater group. With the Groundlings, Day and Michael Naughton wrote and co-starred in David Blaine Street Magic, a parody of magician David Blaine, portrayed by Mitch Silpa. The video, posted to YouTube, was once one of the most-viewed videos on the site.
Day was an original cast member on the improvisational comedy series Wild 'n Out on MTV. He played various characters in the Groundling stage show Groundlings, In The Study, With The Candlestick in early 2009 and directed Groundlings Space Camp. Day wrote for Showtime's The Underground in 2006.
Day starred in NBC's Kath & Kim remake (2009), wrote for and co-produced the Cartoon Network show Incredible Crew (2013), and wrote for Adult Swim's Robot Chicken in 2014. Day hosted a recurring segment parodying TMZ from 2010 to 2013 on The Jay Leno Show and The Tonight Show with Jay Leno. Day was a featured cast member of NBC variety show Maya & Marty, alongside Maya Rudolph, Martin Short, and Kenan Thompson. He also served as one of the show's co-head writers.
Day was hired as a writer for Saturday Night Live in 2013 for its 39th season. He was recommended for the job by Nasim Pedrad who had worked with him before and was a cast member of SNL at the time. On SNL he wrote many sketches featuring cast member & former Wild 'n Out co-star Taran Killam, with whom he wrote the screenplay to Brother Nature (2016).
He was promoted to featured player for season 42 and was promoted to a repertory player in the beginning of season 44. For his audition, he impersonated Donald Trump Jr. and SNL actor Kyle Mooney. His debut appearance was in season 42's first episode, October 1, 2016, hosted by Margot Robbie. Bobby Moynihan, Streeter Seidell, and Day wrote the sketch "Haunted Elevator" for the October 22, 2016 episode of SNL. Starring Tom Hanks as David S. Pumpkins, Day played one of two dancing skeletons in the sketch. The sketch went viral, and he reprised the role for The David S. Pumpkins Halloween Special (2017).
Day and his writing partner Streeter Seidell have completed one project and have two projects in development for Disney. The first of these, Home Sweet Home Alone, the sixth film in the Home Alone franchise, was released on Disney+ on November 12, 2021. A live-action Inspector Gadget film is in pre-production. A remake of SpaceCamp produced by Walt Disney Pictures is also planned.