Ted Arnbjörn Gärdestad was a Swedish singer, songwriter, musician and actor known internationally as Ted. Gärdestad began his acting career in 1966 and began playing music in 1971, signing with Polar Music. Assigned with in-house producers Benny Andersson and Björn Ulvaeus, Gärdestad released his first single, "Hela världen runt," in late 1971 and worked closely with the four members of ABBA to create his debut album Undringar (1972). As Polar Music's best-selling solo artist, he continued to work with the group members throughout the 1970s, releasing three more albums Ted (1973), Upptåg (1974) and Franska Kort (1976), which were moderately successful. In 1978, Gärdestad released his first English-language album, Blue Virgin Isles, which did not have success internationally, as his predecessor albums had in his home country.

John Charles Kenneth Gärdestad was a Swedish songwriter, best known for writing lyrics for the songs of his brother, Ted Gärdestad. He participated at Melodifestivalen 1979 as a songwriter for the winning song "Satellit" performed by his brother. The song went on to Eurovision the same year, where it placed 17th. Gärdestad was also an architect, affiliated to the private Kunskapsskolan, where he designed the interior of several of its high schools. Gärdestad published the biography Jag vill ha en egen måne in 2005. In later years he became a mental health activist, and created the "Ted Gärdestad Stipend", a prize awarded to amateur singers and songwriter.