this is not confirmed yet but a lot of rumors are already said and that a lot of source are already saying that they did get married still the confirmation from the couple is not yet given. According to the source they got married on Friday and that it is a simple private wedding that is it is only with family and a couple of friends. Read more about it at
Source: Beyoncé and Jay-Z Are Married - Weddings, Beyonce Knowles, Jay-Z : People.com