Henry and Lois Marion Seacat in Greensburg, Kansas Seacat began acting in theater in the early 1960s. After a summer-stock production of Leonid Andreyev's play The Waltz of the Dogs, The Village Voice described her as "destined to bring many future stages alive." She moved to New York and studied acting with Michael Howard, later becoming a member of the Actors Studio, where she studied method acting under Lee Strasberg, the studio's director. In the early 1970s, she taught at the Lee Strasberg Theatre Institute, City College of New York's Leonard Davis Center for the Performing Arts, and as a member of the Actors Studio, as well as teaching privately. Steve Railsback and Mickey Rourke, who told New York Magazine that Seacat was his mentor for six years, were among her clients during that period. Seacat worked in both New York and Los Angeles, coaching actors such as Jessica Lange as Lange prepared for her role in the 1982 film Frances. According to The New York Times, Seacat helped pioneer the practice of dream work, where actors study and play characters from their dreams. She also taught the method to her daughter, Greta Seacat, who also became an acting coach. Seacat clients Melanie Griffith and Gina Gershon have publicly credited Seacat's use of the dream method with improving their craft.