Fred Figglehorn

Fred Figglehorn (stylized on webpage and on T-shirts as F?ED) is a fictional character created and portrayed by American actor Lucas Cruikshank. Fred is a 6-year-old boy, with a high voice, and has a dysfunctional home life and "anger management issues." Cruikshank, a teenager from Columbus, Nebraska, created the Fred video series for his channel on the video-sharing website YouTube, to center around the Fred character. Although Cruikshank voices Fred, the audio is digitally altered to sound higher-pitched than Cruikshank's true voice.

source: Wikipedia