Reginald John Connelly, born on October 22, 1895, in Buckhurst Hill, Essex, England, was a British songwriter and music publisher. He was active primarily during the 1920s and 1930s. Connelly formed a successful songwriting and publishing partnership with James Campbell, also known as Jimmy Campbell. Together, they often used the pseudonym Irving King for their compositions and co-founded the music publishing firm Campbell Connelly in 1929.

Their collaboration produced several notable songs, including "If I Had You" (1928), "Goodnight Sweetheart" (1931), and "Try a Little Tenderness" (1932), the latter of which became a jazz standard and was famously revived by Otis Redding in 1966. Connelly's business acumen helped establish Campbell Connelly as one of the most successful music publishing companies globally, with significant collaborations in both Britain and America.

Reginald Connelly passed away on September 23, 1963, in Poole, Dorset, England, leaving behind a legacy of influential music that continues to be celebrated.