Fereydun Robert Armisen (born December 4, 1966) is an American actor, comedian, musician, and writer. With his comedy partner Carrie Brownstein, he co-created and co-starred in the IFC sketch comedy series Portlandia. He also co-created and starred in the mockumentary IFC series Documentary Now! and the Showtime comedy series Moonbase 8.

Armisen was the bandleader and frequent drummer for the Late Night with Seth Meyers house band, the 8G Band from 2014 to 2024. He is known as a cast member on the late-night sketch comedy and variety series Saturday Night Live from 2002 to 2013. He also voiced Speedy Gonzales on The Looney Tunes Show.

Armisen has acted in comedy films, including EuroTrip, Melvin Goes to Dinner, The Ex, and The Dictator. He is also notable for his guest-star appearances in television shows such as 30 Rock, Parks and Recreation, Brooklyn Nine-Nine, New Girl, Broad City, Unbreakable Kimmy Schmidt, Difficult People, The Last Man on Earth, Toast of London, Curb Your Enthusiasm, Modern Family, and Barry.

Armisen received a Grammy Award nomination for Best Comedy Album for Standup for Drummers in 2019. He has also won two Peabody Awards, one in 2008 as part of the Saturday Night Live political satire cast and one in 2011 for Portlandia. From 2019 to 2022, he co-starred and served as writer and executive producer on the Spanish-language series Los Espookys, which he co-created.