Alex van Warmerdam (born 14 August 1952) is a Dutch screenwriter, film director, and actor.

Van Warmerdam was born in Haarlem, a city in the province of North Holland in the Netherlands.

In 1980, he founded the theatre group De Mexicaanse Hond (The Mexican Dog), together with his brother Marc van Warmerdam.

Alex van Warmerdam is married to Dutch actress Annet Malherbe, who plays parts in most of his films and also functions as a casting director.

Their son Mees is a musician and has performed in various shows by theatre group De Mexicaanse Hond.