According to Wikipedia, Millie the Model "was created by writer-artist Ruth Atkinson, one of the pioneering women cartoonists in comic books. Following this first issue, subsequent early stories were drawn mostly by Timely staffer Mike Sekowsky."
I wish to dispute this claim. I do not believe that Mike Sekowsky had anything to do with early Millie. After the first issue, Millie was mostly written and drawn by Ken Bald - who also drew all her covers up until around issue #15 or #16 (shortly before Dan DeCarlo started drawing Millie).
I do not have a copy of Millie #1, but the cover art was clearly drawn by Frank Carin (who drew a lot of other early Timely teen titles such as Patsy Walker, Georgie, Tessie the Typist, Gay, Joker, etc). so I'd bet he did the interior artwork as well. With issue #2, Millie's look was re-invented by Ken Bald.
Can anyone with more Millie knowledge confirm or deny any of this? Considering the popularity of the title, I'm surprised there isn't a more accurate database of information. Sources like ComicVine are worthless.