Arnold Martinez (born March 29, 1985), professionally known as Lil Duke, is an American recording artist hailing from Atlanta, Georgia.

Lil Duke is a member of Young Thug’s Young Stoner Life Records. He started out as Yung Duke in BFPL back in the late 00s before joining MPA with Peewee Longway, where he changed his name to MPA Duke. But after the MPA collective disbanded around 2015, he stuck with Thugger and joined YSL as Lil Duke, which is the moniker under which he’s released all his music while in YSL. However, he is often credited on his features simply as Duke, so his official stage name goes back and forth.