The power of his voice allowed Secombe to appear in many stage musicals. This included 1963's "Pickwick," based on Charles Dickens' "The Pickwick Papers", which gave him the number 18 hit single "If I Ruled the World" – his later signature tune. In 1965 the show was produced on tour in the United States, where on Broadway he garnered a nomination for a Tony Award for Best Actor in a Musical. Secombe scored his biggest hit single in 1967 with his version of "This Is My Song", which peaked at no. 2 on the charts in April 1967 while a recording by Petula Clark, which had hit no. 1 in February, was still in the top ten. He also appeared in the musical "The Four Musketeers" (1967) at Drury Lane, as Mr. Bumble in Carol Reed's film of "Oliver!" (1968), and in the Envy segment of "The Magnificent Seven Deadly Sins" (1971).