* Box office revenue: This might favor actors in big-budget films.
* Critical acclaim: Awards like Oscars and BAFTAs are important measures, but might not reflect global reach.
* Cultural impact: Some actresses have transcended their careers and become icons, influencing generations.
* Longevity: Some actresses have sustained successful careers for decades.
* Personal wealth: This can be a measure of commercial success, but doesn't always correlate with artistic impact.
Some strong contenders for the title include:
* Meryl Streep: With 3 Academy Awards and 21 nominations, she holds the record for most nominations for acting, and is widely considered one of the greatest actresses of all time.
* Katharine Hepburn: She won 4 Academy Awards for Best Actress, a record at the time, and was a major box-office draw for decades.
* Audrey Hepburn: A fashion icon and humanitarian, she is still considered a cultural touchstone, known for her elegance and grace.
* Elizabeth Taylor: One of the most glamorous actresses of her time, she was also a major box-office draw and a prominent figure in Hollywood.
* Barbra Streisand: A multi-talented performer, she is the only person to win an Emmy, Grammy, Oscar, and Tony Award, and is considered a cultural icon.
* Lucille Ball: She was a comedic genius who revolutionized television with her iconic sitcom, "I Love Lucy," and remains one of the most popular actresses in history.
* Marlon Brando: While a male actor, his influence on acting style and cultural impact is undeniable.
Ultimately, the answer to who is the "most successful" actress is subjective and depends on how you define success. Each of these actresses has left an indelible mark on the film industry and popular culture, and their legacies continue to inspire and entertain.