This study investigates the use of combined voice and facial expression analysis for early Parkinson's disease (PD) detection. Using a smartphone-based system, 371 participants (186 PD patients, 185 controls) underwent simultaneous voice and facial recordings while reading. Nine machine learning classifiers were applied. Integrated features achieved an AUROC of 0.85 in the training cohort and 0.90 in the validation cohort, suggesting that this approach could aid in early PD identification.