Born in Langen/Hesse. Moved 1992 to Berlin to study acting. After her diploma, she has been working at different Berlin stages (i.e. the »Berliner Ensemble«).
Billa also works as an improv coach for other groups, teaches at different acting schools, and has been the M.C. at various events (i.e. the Teddy Award 2009).
Since 2010 she has also worked as a director, in collaboration with her Gorillas colleague Michael Wolf, for »42« in Leipzig (nominated for a local theatre prize) and 2012 for »Until death...«. Both plays were developed with improvisation.