Desc: I'll Be Your Sweetheart: Directed by Val Guest. With Margaret Lockwood, Vic Oliver, Michael Rennie, Peter Graves. In turn-of-the-century London a young music publisher convinces both songwriters and a music hall singer with his new ideas to make business, while fighting both competitors and piracy in a time where author's royalties were still unprotected. A well crafted British musical with plenty of popular songs.