From Wikipedia, the free encyclopedia Jack Selig Yellen (Jacek Jeleń; July 6, 1892 – April 17, 1991) was an American lyricist and screenwriter. He is best remembered for writing the lyrics to the songs "Happy Days Are Here Again", which was used by Franklin Roosevelt as the theme song for his successful 1932 presidential campaign, and "Ain't She Sweet", a Tin Pan Alley standard. Early life and education Born to a Jewish family in Poland, Yellen emigrated with his family to the United States when he was five years old. The oldest of seven children, he was raised in Buffalo, New York and began writing songs in high school. He graduated with honors from the University of Michigan in 1913 where he was a member of the Pi Lambda Phi Fraternity. After graduating he became a reporter for the Buffalo Courier, continuing to write songs on the si...read more