Career
She also competed at the 1996 Summer Olympics, 2000 Summer Olympics, 2008 Summer Olympics and 2012 Summer Olympics. She is the daughter of retired Olympic field hockey player Carsten Keller and granddaughter of player Erwin Keller. Her brothers Andreas Keller and Florian Keller, like her father and herself, were on gold medal winning field hockey teams.
Keller has accumulated over 400 games for the Germany women"s national field hockey team, which makes her the country"s most capped female player in history.
Keller was the flag bearer for Germany at the 2012 Summer Olympics, becoming the first field hockey athlete being honoured this way. National Olympics Committee for Germany: Die deutsche Olympiamannschaft.