"I'll Never Smile Again" is a 1939[1] song which became a 1940 Billboard chart-topper by Tommy Dorsey written by Ruth Lowe.

The most successful and best-known million selling single version of the song was recorded by Tommy Dorsey and His Orchestra, with vocals provided by Frank Sinatra and The Pied Pipers.

[3] Tommy Dorsey has a solo on trombone during the break and as a coda near the end of the song.

[5] Tommy Dorsey and Frank Sinatra performed the song in the 1941 Paramount Pictures musical Las Vegas Nights.

The Dorsey and Sinatra recording was also released as a V-disc in February, 1946 by the U.S. War Department for the armed forces.