She co-wrote all of the film's songs with her friend and Decca Records colleague Francis Sonny" Burke, who had previously co-written such standards as Midnight Sun and Black Coffee. The team's most enduring songs from the Lady score were Bella Notte," The Siamese Cat Song ("We are Siamese, if you please..."), and He's a Tramp.
In addition to lending her songwriting talents, Peggy supplied the speaking and singing voices of one human (Darling, the first-time mother, who sings La La Lu), one dog (the saucy Peg, who sings He's a Tramp), and two devious cats (Si and Am, who sing The Siamese Cat Song). Peggy even had a small role in shaping the storyline by persuading the writers to let the bloodhound character Trusty live.
Music plays a huge part in setting the mood and telling the story of cocker spaniel Lady's birth, growth and romantic coming of age, for which we must thank the great singer and composer Peggy Lee.
Together with her longtime collaborator Sonny Burke, Lee wrote most of the film's score, including that most memorable song from an Italian restaurant, Bella Notte," where the uptown Lady and the downtown Tramp suck up the same strand of spaghetti. And yes, that's also Lee singing the snarky, sinewy cat vocals on We Are Siamese," and voicing the worldly wise, femme fatale pooch Peg, who belts He's a Tramp. She is also the dramatic voice of Lady's mistress, who answers to 'Darling...' Too bad she's not still with us, to revel in this glorious DVD restoration.
As with many Disney releases, Lady and the Tramp 50th Anniversary Edition will be available only for a limited time.