In February 2013 Lunacek was elected vice-president of the Greens/EFA group in the European Parliament, under the leadership of Rebecca Harms and Daniel Cohn-Bendit.[1] Following the 2014 European elections, the group voted for her as candidate for the presidency of the European Parliament.[9] She served as one of the fourteen Vice Presidents of the European Parliament who sit in for the president in presiding over the plenary.