Ali G is otherwise known as Sacha Baron Cohen.
The character Ali G first appeared on Channel 4's Eleven O'Clock show as the "voice of da youth". Ali G was featured in Madonna's video for her song "Music" as the limousine driver, and recorded his own record with the reggae/pop performer Shaggy.
In 2001, Ali G hosted MTV Europe Music Awards in Germany. In 2002, he was the character in the feature film Ali G Indahouse. He is now the main character of HBO's Da Ali G Show, which also features two other characters: Borat Sagdiyev and Bruno, a fashion reporter for Austria's fictional Gay TV.