This paper investigates the effect of managerial incentives and corporate governance on capital structure using a large sample of UK firms during the period 1999-2004. The analysis revolves around the view that managerial incentives are important in determining a firm's leverage. However, we argue that the exact impact of these incentives on leverage is likely to be determined by firm-specific governance characteristics. To conduct our investigation, we construct a simple corporate governance measure using detailed ownership and governance information. We present evidence of a significant non-monotonic relationship between executive ownership and leverage. There is also strong evidence suggesting that corporate governance practices have a significant impact on leverage. More importantly, the results reveal that the nature of the relation between executive ownership and leverage depends on the firm's corporate governance structure.