This is from Wikipedia–

Known for her fierce independence and spirited personality, Hepburn was a leading lady in Hollywood for more than 60 years. She appeared in a range of genres, from screwball comedy to literary drama, and she received four Academy Awards—a record for any performer—for Best Actress. In 1999, Hepburn was named by the American Film Institute as the greatest female star of Classic Hollywood Cinema.

Raised in Connecticut by wealthy, progressive parents, Hepburn began to act while studying at Bryn Mawr College. After four years in the theatre, favorable reviews of her work on Broadway brought her to the attention of Hollywood. Her early years in the film industry were marked with success, including an Academy Award for her third picture, Morning Glory (1933), but this was followed by a series of commercial failures that led her to be labeled “box office poison” in 1938. Hepburn masterminded her own comeback, buying out her contract with RKO Radio Pictures and acquiring the film rights to The Philadelphia Story, which she sold on the condition that she be the star. In the 1940s, she was contracted to Metro-Goldwyn-Mayer, where her career focused on an alliance with Spencer Tracy. The screen-partnership spanned 25 years and produced nine movies.  Full Article HERE

Katherine Hepburn was famous for her prim and proper romantic comedy Power of Conscience roles including: Rose Sayer in The African Queen; Amanda Bonner in Adam’s Rib; and Eula Goodnight in Rooster Coburn. She often played high society ladies who could be characterized as snooty, judgmental, and argumentative women, who were thought to be “too big for their britches.”  Watch her go at Carey Grant and Spencer Tracey below