Happiness at work is being sought by business owners, policymakers, and employees at large as happy employees are generally more productive ones. The present study has examined the relationship of Leader-Member Exchange (LMX) with happiness. Also hypothesized that Perceived Organizational Support (POS) and resilience would positively contribute to happiness and would mediate the relationship between LMX and happiness. The participants in the study were 217 working professionals with diverse backgrounds. Data were analyzed through Smart PLS4 software. Analyses revealed that LMX, POS, and resilience were positively related to happiness. Mediation hypotheses were also supported. POS and resilience partially mediated the Happiness- LMX relationship. The results were interpreted within the social exchange theory framework.