Edie may have not been a star in the theater, but she is in the book about her daughter.
Edie loved dirty jokes, know her daughter's earlier engagement (before Ronnie) was probably a mistake because he was gay. And Edie was very friendly with Spencer Tracy and Many Martin. Tracy helped Nancy at her screen test at MGM.
Martin gave her a small role in a musical (and a much bigger role to Yul Brynner). And as first lady, Mrs. Reagan sang a song with Martin on stage in the 1985 tribute "Our Hearts Belong to Mary"