Developing leadership skills during adolescence is crucial for future career success. Previous studies have primarily focused on the impact of school settings, academic courses, and simulated team tasks on leader emergence, neglecting the significant role of parental influence in this process. Employing a mixed-methods approach, this research investigated the positive relationship between parental warmth and adolescent leader emergence and the underlying mechanisms of this relationship. The quantitative study (Study 1) collected multi-source data from 1255 adolescents (Mage = 14.2, SDage = 0.56, 48.2% male) and their parents, teachers and peers. Findings from Study 1 revealed a positive correlation between parental warmth and adolescent leader emergence. Structural equation modeling showed two mediating pathways: an intrapersonal pathway involving self-esteem and leader self-efficacy, and an interpersonal pathway involving empathy and prosocial behavior. Encouragement of independence, as an additional adolescents-focused parenting practice, strengthened the observed positive relationship. The qualitative study (Study 2) conducted in-depth interviews with adolescents to identify the parental practices that facilitate or hinder adolescent leader emergence for the triangulation of the central research question. Study 2 collected data from 32 adolescents (Mage = 15.16, SDage = 1.37, 50% male). Findings from Study 2 corroborated the significance of parental warmth and the encouragement of independence for adolescent leader emergence, elucidating specific parenting behaviors conducive to these positive parenting practices, such as providing companionship and communication, as well as encouraging adolescents to participate in household tasks. This mix-methods research prepositioned the stages of leadership development, advocating for the importance of the warmth and autonomy from parents as formative factors for cultivating the next generation of leaders.