Andrew Robert Nielsen (born October 6, 1982), known professionally as MC Lars, is an American record producer, rapper, cartoonist, podcaster and educator.

As a touring act, Nielsen has opened for Snoop Dogg, I Fight Dragons, the Matches, Lupe Fiasco, Nas, Simple Plan, Bowling for Soup, Gym Class Heroes, Say Anything, Streetlight Manifesto, Suburban Legends, Test Icicles, Jack's Mannequin, Bayside, Fightstar, MC Frontalot, MC Chris, Wheatus, The Aquabats, T-Pain, Yung Joc, Cartel, Zebrahead[9][10] and Insane Clown Posse.

The term "iGeneration", coined by Lars in 2003, was used to describe the generation born primarily in the mid-to-late 1980s, was used in his song of the same name and given out for free to Facebook users in August 2006 in conjunction with iTunes.

After releasing the "Edgar Allan Poe EP", MC Lars performed at Carnegie Hall as part of the Scholastic Art & Writing Awards National Ceremony.

[13] Subsequently, he delivered a TEDx talk at the University of Southern California on the ties between literature and rap, in collaboration with the Annenberg School for Communication and Journalism.

Not long after the album was released on iTunes, Lars received an email from a 15-year-old fan Elisa Greubel on his web forum saying she identified with "Download This Song" since her family was one of many being sued by the Recording Industry Association of America.

In April 2007, MC Lars and Nettwerk made the component tracks for his single "White Kids Aren't Hyphy" available for remix under a by-nc-sa Creative Commons license on the Jamglue online mixing site as a contest.

[20] In 2008 and 2009, Lars worked with "Weird Al" Yankovic, Wheatus, the Rondo Brothers, Nick Rowe and Mike Kennedy of Bloodsimple, Daniel Dart of Time Again, Pierre Bouvier of Simple Plan, the MC Bat Commander of the Aquabats, Suburban Legends, Worm Quartet, Gabe Saporta of Cobra Starship, Brett Anderson of the Donnas, MC Frontalot, Jesse Dangerously, Jaret Reddick of Bowling for Soup, Linus Dotson of Size 14, Parry Gripp of Nerf Herder, Jonathan Coulton, Aesias Finale, Sebastian Reynolds, Joe Ragosta of Patent Pending and classical musician Walt Ribeiro to complete his album This Gigantic Robot Kills.

was a return to basics, with less punk elements and more standard hip-hop stylings, funded by Kickstarter, featuring cameos from KRS-One, Sage Francis and Mac Lethal.

This marked the first time Lars performed live without any form of backing track, relying instead on the band to recreate the music instrumentally using samples and triggers.

[25][26][27][28] In 2008, he played a key role in G4's rebrand alongside Del the Funky Homosapien, YTCracker, and MC Frontalot, creating musical bumpers and segments aimed at millennial gamers and hip-hop fans.