David Frank Paich is an American keyboardist, singer, and songwriter, best known as the co-founder, principal songwriter, keyboardist, and secondary vocalist of the rock band Toto since 1977. He wrote or co-wrote much of Toto's original material, including the band's three most popular songs: "Hold the Line", "Rosanna", and "Africa". With Toto, Paich has contributed to 17 albums and sold over 40 million records. He and guitarist and singer Steve Lukather are the only members to appear on every studio album.

Steven Lee "Luke" Lukather is an American guitarist, singer, songwriter, arranger and record producer, best known as the sole continuous founding member of the rock band Toto. His reputation as a skilled guitarist led to a steady flow of session work beginning in the 1970s that has since established him as a prolific session musician, recording guitar tracks for more than 1,500 albums spanning a broad array of artists and genres. He has also contributed to albums and hit singles as a songwriter, arranger and producer. Notably, Lukather played guitar on Boz Scaggs' albums Down Two Then Left (1977) and Middle Man (1980), and was a prominent contributor to several studio albums by Michael Jackson, including Thriller (1982). Lukather has released nine solo albums, the latest of which, Bridges, was released in June 2023.