The Group of the Alliance of Liberals and Democrats for Europe was the liberal–centrist political group of the European Parliament from 2004 until 2019. It was made up of MEPs from two European political parties, the Alliance of Liberals and Democrats for Europe Party and the European Democratic Party, which collectively form the Alliance of Liberals and Democrats for Europe.

The 2019 European Parliament election was held between 23 and 26 May 2019, the ninth parliamentary election since the first direct elections in 1979. A total of 751 Members of the European Parliament (MEPs) represent more than 512 million people from 28 member states. In February 2018, the European Parliament had voted to decrease the number of MEPs from 751 to 705 if the United Kingdom were to withdraw from the European Union on 29 March 2019. However, the United Kingdom participated alongside other EU member states after an extension of Article 50 to 31 October 2019; therefore, the allocation of seats between the member states and the total number of seats remained as it had been in 2014. The Ninth European Parliament had its first plenary session on 2 July 2019.