Born as Aleck Ford on the Sara Jones Plantation in Tallahatchie County,Mississippi, his date and year of birth are a matter of uncertainty. He claimed to have been born on December 5, 1899, but one researcher, David Evans, claims to have found census record evidence that he was born around 1912. His gravestone lists his date of birth as March 11, 1908.
He lived and worked with his sharecropper stepfather, Jim Miller, whose last name he soon adopted, and mother, Millie Ford, until the early 1930s. Beginning in the 1930s, he traveled around Mississippi and Arkansas and encountered Big Joe Williams, Elmore James and Robert Lockwood Jr., also known as Robert Junior Lockwood, who would play guitar on his later Checker Records sides. He was also associated with Robert Johnson during this period. Miller developed his style and raffish stage persona during these years. Willie Dixon recalled seeing Lockwood and Miller playing for tips in Greenville, Mississippiin the 1930s. He entertained audiences with novelties such as inserting one end of the harmonica into his mouth and playing with no hands.
In 1941 Miller was hired to play the King Biscuit Time show, advertising the King Biscuit brand of baking flour on radio station KFFA in Helena, Arkansas with Robert Lockwood Jr.
It was at this point that the radio program’s sponsor, Max Moore, began billing Miller as Sonny Boy Williamson, apparently in an attempt to capitalize on the fame of the well known Chicago-based harmonica player and singer John Lee Williamson (see Sonny Boy Williamson I). Although Sonny Boy Williamson, (John Williamson) was a major blues star who had already released dozens of successful and widely influential records under the name “Sonny Boy Williamson” from 1937 onward, Aleck Miller would later claim to have been the first to use the name, and some blues scholars believe that Miller’s assertion he was born in 1899 was a ruse to convince audiences he was old enough to have used the name before John Lee Williamson, who was born in 1914. (This is made somewhat less likely, however, by the fact that Miller was certainly older than Williamson even if one does not accept the 1899 birthdate.) Whatever the methodology, Miller became commonly known as “Sonny Boy Williamson,” (universally distinguished by blues fans and musicians as “Sonny Boy Williamson number two” or “Sonny Boy Williamson the second”) and Robert Lockwood Jr and the rest of his band were billed as the King Biscuit Boys.
