Charisma, often seen as an innate trait, is now understood as leader signaling grounded in values, symbols, and emotions, suggesting it can be developed through interventions. However, the method for cultivating charisma remains unclear. This study examines nonverbal communication strategies, highlighting the potential of body language, facial expressions, and vocal modulation to enhance charisma. Additionally, we introduce a virtual reality training program focused on these cues and explore the role of audience presence in boosting the intervention’s effectiveness by fostering self-awareness and behavioral adjustments. Results of a controlled randomized experiment with virtual reality-trained participants and online charisma assessors demonstrated significant improvements in observer-rated charisma from pre- to post-training compared to the control group. Moreover, training in front of a virtual audience yielded the expected outcomes. This study sheds light on charisma theory, its potential virtual reality training application, and its implications for leadership development.