Veronica Lake. Veronica Lake was 21 in The Hour Before the Dawn as 'Dora Bruckmann'.
Franchot Tone. Franchot Tone was 39 in The Hour Before the Dawn as 'Jim Hetherton'.
John Sutton. John Sutton was 35 in The Hour Before the Dawn as 'Roger Hetherton'.
Binnie Barnes. Binnie Barnes was 41 in The Hour Before the Dawn as 'May Hetherton'.
Henry Stephenson. Henry Stephenson was 73 in The Hour Before the Dawn as 'Gen. Hetherton'.
Philip Merivale. Philip Merivale was 57 in The Hour Before the Dawn as 'Sir Leslie Buchanon'.
Nils Asther. Nils Asther was 47 in The Hour Before the Dawn as 'Kurt van der Breughel'.
Edmund Breon. Edmund Breon was 61 in The Hour Before the Dawn as 'Freddy Merritt'.
David Leland. David Leland was 12 in The Hour Before the Dawn as 'Tommy Hetherton'.
Mary Gordon. Mary Gordon was 61 in The Hour Before the Dawn as 'Annie'.
Raymond Severn. Raymond Severn was 13 in The Hour Before the Dawn as 'Jim (as a boy)'.
Aminta Dyne. Aminta Dyne was 56 in The Hour Before the Dawn as 'Mrs. Muller'.
Frank Tuttle. Frank Tuttle was 51 in The Hour Before the Dawn as 'Director'
John F. Seitz. John F. Seitz was 51 in The Hour Before the Dawn as 'Director of Photography'
Michael Hogan. Michael Hogan was 50 in The Hour Before the Dawn as 'Writer'Stuart Gilmore. Stuart Gilmore was 35 in The Hour Before the Dawn as 'Editor'
Miklós Rózsa. Miklós Rózsa was 37 in The Hour Before the Dawn as 'Original Music Composer'Bertram C. Granger. Bertram C. Granger was 52 in The Hour Before the Dawn as 'Set Decoration'Hans Dreier. Hans Dreier was 58 in The Hour Before the Dawn as 'Art Direction'A. Earl Hedrick. A. Earl Hedrick was 48 in The Hour Before the Dawn as 'Art Direction'
W. Somerset Maugham. W. Somerset Maugham was 70 in The Hour Before the Dawn as 'Novel'