Katrin Becker was born in Gelsenkirchen, Germany to Ingrid and Karl-Hans Becker on October 7, 1967. She grew up in Malaga, Spain, with her older sister Melanie Becker, and the two sisters were recruited to Texas A&M in 2005 as part of a faculty reinvestment program. Katrin survived her sister and collaborator Melanie who died in 2020 after a long fight with cancer.