Katy M. O’Brian (born February 12, 1989) is an American actress, writer, and martial artist. She is best known for her roles as Jentorra in Ant-Man and the Wasp: Quantumania, George in Syfy’s zombie show Z Nation, Major Sarah Grey in The CW’s superhero series Black Lightning and Kimball in Marvel's Agents of S.H.I.E.L.D.. O'Brian plays Imperial communications officer Elia Kane in the second and third seasons of The Mandalorian.
O'Brian was born in February 12, 1989 in Indianapolis, Indiana. At the age of 9, O'Brian earned her brown belt in Shorei Goju Ryu Karate. Throughout her youth, she participated in numerous sports programs and music programs as a percussionist.[citation needed]
O'Brian attended Indiana University Bloomington, majoring in psychology and Germanic studies. She was one of the first members of the university's short-form improv troupe Hoosonfirst and received law enforcement certification through the university's Cadet Officer Program. While at the university, Katy received her black belt in Hapkido through the United States Hapkido Federation.

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