We examine the effect of the relative liquidity of international equity exchange-traded funds (ETFs) and their constituent portfolios on the price difference between the fund’s market prices and its net asset values. We use data for a sample of 584 international equity ETFs listed in the U.S. over the period January 2012 to December 2017 and find that higher liquidity is associated with a lower absolute value of the ETF premium/discount. We document a positive relationship between liquidity and the price convergence of the ETFs and their underlying shares. The effect of liquidity on convergence is stronger for ETFs with high holding costs.