In a Sentimental Mood: Mathis Sings Ellington is an album by American pop singer Johnny Mathis that was released on October 9, 1990, by Columbia Records and continues the studio album pattern that began with The Hollywood Musicals and In the Still of the Night in which the song selections adhere to a specific theme or focus. This is the first Mathis album whose release did not include the LP record format, which was discontinued earlier in the year.