Helen Walker

TCM.com states that this is the feature film debut of Helen Walker, though she is not listed in their credits, nor is she listed anywhere else that I've looked, though there are many other uncredited names (including Yvonne DeCarlo). Does anyone know if this is true, or not?

During production, this film's title was changed from The Crystal Ball to Redheads Are Dangerous, and back again to The Crystal Ball. A pre-production Hollywood Reporter news item noted that Ginger Rogers was originally considered for the lead role, while a modern source noted that Charles Boyer was intended as her co-star. The film marked Helen Walker's feature film debut. According to a Hollywood Reporter news item, the picture was originally to close with a train sequence, but the script was rewritten as all forms of transportation were restricted due to the war. The picture was among a package of films that were produced by Paramount Pictures, Inc. and purchased by United Artists in 1942 for release under the Cinema Guild label.