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Clifton Webb as John Philip Sousa |
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Debra Paget as Lily Becker |
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Robert Wagner as Willie Little |
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Ruth Hussey as Jennie Sousa |
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Finlay Currie as Col. Randolph |
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Roy Roberts as Maj. George Porter Houston |
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Thomas Browne Henry as David Blakely (as Tom Browne Henry) |
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Helen Van Tuyl as Mrs. President Harrison |
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Dorinda Clifton as Dancer (uncredited) |
| Directing | Henry Koster | Director |
| Writing | Lamar Trotti | Screenplay |
| Production | Lamar Trotti | Producer |
| Sound | Alfred Newman | Music |
| Crew | Charles G. Clarke | Cinematography |
| Editing | James B. Clark | Editor |
| Art | Lyle R. Wheeler | Art Direction |
| Art | Joseph C. Wright | Art Direction |
| Art | Claude E. Carpenter | Set Decoration |
| Art | Thomas Little | Set Decoration |
| Costume & Make-Up | Dorothy Jeakins | Costume Design |
| Costume & Make-Up | Ben Nye | Makeup Artist |
| Production | Gaston Glass | Unit Production Manager |
| Production | R.L. Hough | Assistant Production Manager |
| Art | Glenn "Skippy" Delfino | Props |
| Sound | Alfred Bruzlin | Sound |
| Sound | Roger Heman Sr. | Sound |
| Crew | Ray Kellogg | Special Effects |
| Costume & Make-Up | Charles LeMaire | Wardrobe Supervisor |
| Costume & Make-Up | Sam Benson | Wardrobe Assistant |
| Editing | Lyman Hallowell | Assistant Editor |
| Sound | Leo Arnaud | Orchestrator |
| Sound | Ken Darby | Vocal Coach |
| Sound | Alfred Newman | Music Director |
| Writing | John Philip Sousa | Book |
| Writing | Ernest Vajda | Story |
