AllMusic reviewer Thom Owens stated: "Half of Sonny Is King is devoted to a rare session between Sonny Terry and Lightnin' Hopkins ... but the rhythm section fails to kick the pair into overdrive, and much of the music disappointingly meanders ... That's proven by the second side of the album, where Terry falls into the comfortable setting of duetting with Brownie McGhee. While these aren't among the duo's very best recordings, they are nonetheless enjoyable, suggesting that there's something to be said for the familiar".[3]