Lena Dunham's many looks

U.S. actress Lena Dunham holds her memoir, "Not That Kind Of Girl," ahead of a book-signing at Waterstones, Piccadilly in central London, Wednesday, Oct. 29, 2014.

Lena Dunham visits CTV's "The Social" to discuss her first book, "Not That Kind of Girl: A Young Woman Tells You What She’s 'Learned'," at the Bell Media Headquarters, on Thursday, Oct. 23, 2014, in Toronto, Canada.

Actress Lena Dunham arrives at HBO's Post Emmy Awards reception on Monday, Aug. 25, 2014, in West Hollywood, California.

Lena Dunham attends The Metropolitan Museum of Art's Costume Institute benefit gala celebrating "Charles James: Beyond Fashion" on Monday, May 5, 2014, in New York.

Lena Dunham arrives at The Television Academy presents An Evening with "Girls" on Thursday, March 13, 2014, in Los Angeles.

Lena Dunham arrives at the 71st annual Golden Globe Awards at the Beverly Hilton Hotel on Sunday, Jan. 12, 2014, in Beverly Hills, California.

Actress Lena Dunham attends the 23rd Annual Glamour Women of the Year Awards hosted by Glamour Magazine at Carnegie Hall on Monday, Nov. 11, 2013 in New York.

Lena Dunham attends the Governors Ball at the 65th Primetime Emmy Awards at Nokia Theatre on Sunday, Sept. 22, 2013, in Los Angeles.

Actress Lena Dunham attends the TIME 100 Gala celebrating the "100 Most Influential People in the World" at Jazz at Lincoln Center on Tuesday April 23, 2013 in New York.

"The Voice of a Generation" award-winner Lena Dunham attends Glamour Magazine's 22nd annual "Women of the Year Awards" at Carnegie Hall on Monday, Nov. 12, 2012 in New York.

Actress and writer Lena Dunham arrives at the Metropolitan Museum of Art Costume Institute gala benefit, celebrating Elsa Schiaparelli and Miuccia Prada, Monday, May 7, 2012 in New York.