Megan Gallagher (born February 6, 1960) is an American theater and television actor. Having studied at the Juilliard School under the supervision of John Houseman, Gallagher began her career on stage, and has appeared in several Broadway theatre productions, winning a Theatre World Award for her role in A Few Good Men.
From there, Gallagher moved to Los Angeles to pursue acting in film and television; after making a screen debut in George Washington, she graduated to recurring roles in Hill Street Blues and China Beach, and starring roles in The Larry Sanders Show and Millennium. The role of Catherine Black in that series had been written with Gallagher in mind.
Gallagher was born in Reading, Pennsylvania on February 6, 1960, to Aileen and Donald Gallagher. She was the fifth of six children. Her mother had also been an actor in her youth, retiring when she began a family. Gallagher credits her own career to her mother, who would take her to Broadway theatre productions as a child. She has also cited Mary Tyler Moore and Katharine Hepburn as influences on her career. She attended Wyomissing Area Junior/Senior High School, where she elected not to attend her high school prom in order to continue her rehearsals at a local theatre.