It was only when Mercer moved to
Hollywood in
1935 that his career was assured. His first big song "
I'm an Old Cowhand from the Rio Grande" was used by Bing Crosby in a film, and from there his demand as a lyricist took off. He found himself writing more and performing less.
In
1941 Mercer met an ideal musical collaborator in the form of
Harold Arlen whose compositions mixed with
jazz and
blues provided Mercer's sophisticated, slangy lyrics a perfect musical vehicle. Now his
lyrics began to display the combination of sophisticated wit and southern regional vernacular that characterize some of his best songs. Their first hit was "
Blues in the Night" (1941). They went on to compose "
That Old Black Magic" (1942), "
One for My Baby (and One More for the Road)" (1941), "
Ac-Cent-Tchu-Ate the Positive" (1944), and "
Come Rain Or Come Shine" (1946) among others.
In Hollywood he was able to collaborate with a remarkable number of composers, including
Richard Whiting,
Harry Warren,
Jerome Kern,
Harold Arlen,
Jimmy Van Heusen,
Henry Mancini,
Dorothy Fields, and
Hoagy Carmichael. He was adaptable in his style, listening carefully and absorbing a tune and then transforming it into his own style. He said he preferred to have the music first, taking it home and working on it. He claimed composers had no problem with this method as long as he came back with the lyrics.
Mercer cofounded
Capitol Records in Hollywood in 1942 along with businessman Buddy DeSylva and record store owner Glen Wallichs.
After the death of his friend and collaborator, Paul Whiting, he began working with
Harry Warren, one of the best composers in the film business. Starting in the late
1930s, Mercer also had an immensely productive collaborative relationship with
Harold Arlen.
Mercer was often asked to write new lyrics to already popular tunes. The lyrics to "Laura," "Midnight Sun," and "Satin Doll" were all written after the melodies had become hits. He was also asked to write English lyrics to foreign songs, the most famous example being "
Autumn Leaves," based on the French "Les Feuilles Mortes."
Occasionally, Mercer wrote both music and lyrics. "
Something's Gotta Give" is probably the best-known song in this category.
Mercer wrote for some
MGM films, which include
Seven Brides for Seven Brothers (1954) and
Merry Andrew (1958). He wrote the lyrics to "
Moon River" for Audrey Hepburn in
Breakfast at Tiffany's. (Henry Mancini wrote the music.) In
1969, Mercer helped publishers Abe Olman and Howie Richmond found the
National Academy of Popular Music's Songwriters Hall of Fame.
A good indication of the high esteem in which Mercer was held can be seen in the fact that, in
1964, he became the only lyricist to have his work recorded as a volume of
Ella Fitzgerald's celebrated 'Songbook' albums for the
Verve label. Yet Mercer always remained humble about his work, attributing much to luck and timing. He was fond of telling the story of how he was offered the job of doing the lyrics for
Johnny Mandel's music on
The Sandpiper, only to have the producer turn his lyrics down. The producer offered the commission to
Paul Francis Webster and the result was "
The Shadow of Your Smile" which became a huge hit, winning the
1965 Oscar for
Best Original Song.