Early beginnings In 2001, Keller joined the
Green Youth and served as spokesperson of the
Federation of Young European Greens from 2005 to 2007. From 2007 to 2009, she led the Green Party in Brandenburg having joined the
German Green party in 2002. In
Brandenburg, she campaigned for a statewide referendum against new coal mines.
Member of the European Parliament, 2009–2024 During her first term (2009–2014), Keller served on the
Committee on Development from 2009 to 2012. From 2012 to 2014, she was a member of the
Committee on International Trade. In addition to her committee assignments, Keller was also member of the Parliament's delegation with the EU-Turkey Joint Parliamentary Committee. In this capacity, she focused on the issues of migration and the EU's relations with
Turkey. In her second term (2014–2019), Keller became co-president of the
Greens/EFA group in the
European Parliament in 2016. Additionally, Keller was a member of the Committee on International Trade from 2014 to 2017. She continued to serve as a member of the Delegation to the EU-Turkey Joint Parliamentary Committee and joined the Parliament's delegation to the
Cariforum. From 2009 to 2011, Keller also served as member of the European Parliament's High-Level Contact Group for Relations with the Turkish Cypriot Community in the
Northern Part of the Island (CYTR). Keller has been a leading candidate of the
European Green Party for the
European elections in 2014 as well as in
2019. In January 2014, she won the
Green Primary, a pan-European
open primary. On 24 November 2018, Keller was elected leading candidate for the second time, together with
Bas Eickhout.
Sira Rigo of the
GUE/NGL,
David-Maria Sassoli of the
S&D and
Jan Zahradil of the
ECR also ran for the post, with Sassoli eventually winning with the support of 345 out of a total of 667 MEPs. In September 2022, Keller announced her resignation as co-chair of her party's group and her decision not to run again in the
2024 elections. ==Other activities==