Katy M. O'Brian (born February 12, 1989) is an American actress.

She is best known for her roles as bodybuilder Jackie in Love Lies Bleeding, Imperial communications officer Elia Kane in the second and third seasons of The Mandalorian, George in Syfy's zombie show Z Nation, Major Sara Grey in The CW's superhero series Black Lightning, Kimball in Agents of S.H.I.E.L.D., and Jentorra in Ant-Man and the Wasp: Quantumania.