Lou! is a French comic book series and animated television series created by Julien Neel. The comic is published by Glénat and the animated series is broadcast in France on M6 and Disney Channel. The main comic's first "season" came to an end in 2018 after eight volumes, although a prequel series titled Le petit monde de Lou was released in 2019, with the second "season" titled Lou! Sonata beginning with the ninth volume in 2020.

Volume 1, Journal infime, received the Youth Award for ages 9 to 12 at the Angoulême Festival in 2005. Volume 5, Laser Ninja, won the award for best youth comic at the Angoulême Festival in 2010.

The first comic volume, Journal infime, was adapted into 52 12-minute episodes. The series was produced by GO-N Productions in association with M6 television and Disney Channel France, directed by Jérôme Mouscadet, character design adaptation by David Gilson, screenplay by Jean-Rémi François and Anna Fregonese.

A live-action film adaptation based on the comic was released in France on October 8, 2014, but it was filmed on 28 October 2013.