Keebler Character is a term used to describe the characters featured in the Keebler Company's advertising campaigns. The two most popular characters are Ernie, a five-letter ELF, and ELF, a three-letter ELF. Ernie is a mischievous ELF who loves to bake cookies and other treats. He is often seen in commercials and print ads, and is known for his catchphrase 'Ernie's here!' ELF is a more serious ELF who is responsible for overseeing the baking process in the Keebler treehouse. He is often seen in commercials and print ads, and is known for his catchphrase 'Bake it up!' Both Ernie and ELF are beloved characters that have been part of the Keebler family for many years.