
In addition to assuming the role as the band's leader, Gibbons became the main lyricist and musical arranger. The show was booked by KLVI radio personality Al Caldwell, who was also instrumental in broadcasting the band's first recordings. They performed their first concert together at a Knights of Columbus Hall in Beaumont, Texas, on February 10, 1970. After Hill moved from Dallas to Houston, ZZ Top signed with London in 1970. At this moment, all three members of the band were 20 years old. Unwilling to sign a recording contract, Ethridge quit the band and Dusty Hill, Frank Beard's American Blues bandmate, became his replacement in late 1969. Due to lack of interest from the major American record companies, ZZ Top accepted a record deal from London Records, the American affiliate of the British Decca Records label. Immediately after the recording of "Salt Lick", Greig was replaced by bassist Billy Ethridge, a bandmate of Stevie Ray Vaughan, and Mitchell was replaced by Frank Beard of American Blues. Both songs credited Gibbons as the composer. They released their first single, "Salt Lick", in 1969, and the B-side contained the song "Miller's Farm".

ZZ Top was managed by Bill Ham, a Waxahachie, Texas, native who had befriended Gibbons a year earlier. He then figured that "king is at the top" which gave him the idea of naming the band "ZZ Top".

Hill and thought of combining the two into "ZZ King", but considered it too similar to the original name. The band had a small apartment covered with concert posters and he noticed that many performers' names used initials. The original line-up was formed in Houston and consisted of Gibbons, bassist/organist Lanier Greig, and drummer Dan Mitchell.

Within a year, they signed with London Records and released ZZ Top's First Album (1971).

ZZ Top formed after the demise of Moving Sidewalks, Gibbons' previous band, in 1969. They are popular for their live performances, sly and humorous lyrics, and the matching appearances of Gibbons and Hill, who wore sunglasses, hats and long beards. ZZ Top developed a signature sound based on Gibbons' blues guitar style and Hill and Beard's rhythm section. For 51 years, they comprised vocalist-guitarist Billy Gibbons, drummer Frank Beard and vocalist-bassist Dusty Hill, until Hill's death in 2021. ZZ Top is an American rock band formed in 1969 in Houston, Texas.
