Age is nothing but a number and these Hollywood celebrities have proven just that. Most of these actor's prime acting years where in the 30's through the 50's. However, they are still considered to be Hollywood greats. It doesn't really matter how old they get, as they are still able to wow audiences with their performance in classic films such as Spartacus and North by Northwest. You may be surprised to find that actors on this list are still alive, as not all of them have remained in the limelight. Many of these celebs have been fortunate to have great health while others have suffered from a few strokes. Here is a list of some of Hollywood's oldest living celebrities.

Eva Marie Saint - 90 years old

Actress, Eva Marie Saint is best known for her role in Alfred Hitchcock's, North by Northwest and Elia Kazan's, On the Waterfront. Saint won the Academy Award for best supporting actress for her role opposite Marlon Brando in, On the Waterfront.

The actress was very selective in her film roles after her two debuting roles due to wanting to spend time with her family. In 1986 Saint returned to the big screen in the film, Nothing in Common for which she received a warm welcome back. The actress celebrated her 90th birthday on July 4th.

Betty White - 92 years old

Actress, Betty White has been on television for quite some time now. She starred in The Mary Tyler Moore Show in the 70s and she starred on the sitcom, The Golden Girls from 1985 to 1992. She is the only remaining Golden Girl left. White was able to revive her career with the TV Land sitcom, Hot in Cleveland and NBC's Betty White's Off Their Rockers.

In 2013, the actress was awarded by the Guinness World Records for having the longest career for a female entertainer. This past January, White celebrated her 92nd birthday.

Abe Vigoda - 93 years old

Actor, Abe Vigoda is best known for his role as Sal Tessio in the film, The Godfather. Vigoda also appeared in many comedic performances such as his role in the television series, Barney Miller and the 1990 film, Joe Versus the Volcano.

There have been two accounts of false reports stating Vigoda's death which has provided the actor with a running gag as to whether or not he is dead or alive. Fortunately, Vigoda is still alive and well as he celebrated his 93rd birthday this past February.

Maureen O'Hara - 94 years old

Actress, Maureen O'Hara has always been best known for her red-hair and gorgeous looks. In 1947 O'Hara played the role of Doris Walker in the all-time favorite holiday film, Miracle on 34th Street. The actress vividly remembers working with young actress, Natalie Wood and how sad she was the day she died.

O'Hara played the role of a mom again in Disney's 1961 film, The Parent Trap. In 2005 the actress suffered a stroke. She recently celebrated her 94th birthday this past August.

Ellen Albertini Dow- 95 years old

Actress, Ellen Albertini Dow is best known for her role in the 1998 film, The Wedding Singer. Dow played the part of the rapping grandma that surely left an imprint in everyone's minds. Before her big rapping break, Dow had small roles in both Sister Act films and she made TV appearances on shows that included, Seinfeld, Family Matters and The Wonder Years. Recently, she appeared as the grandma in Wedding Crashers. On November 16, Dow will be turning 96 years old.

Zsa Zsa Gabor - 97 years old

Actress and socialite, Zsa Zsa Gabor celebrated her 97th birthday this past February. The actress is best known for her leading role in the 1952 film, Moulin Rouge. Gabor has been known not just for her acting abilities, but for her crazy personal life. She has been married nine times to famous men that include Conrad Hilton, George Sanders and her current husband, Frederic Prinz von Anhalt.

In 2002, Gabor was in an automobile accident that left her reliant on a wheelchair due to being partially paralyzed and in 2005 and 2007 she suffered strokes. The actress also had her right leg amputated in 2011 in order to save her from a life threatening infection.

Kirk Douglas - 97 years old

Actor, Kirk Douglas has had a very lucrative career in Hollywood with films that include, Spartacus, Champion and The Bad and the Beautiful. Douglas has been nominated three times for the Academy Award for Best Actor. Unfortunately, he never won any of them.

Although in 1996, the Academy presented him with an Honorary Academy Award for 50 years as a moral and creative force in the motion picture community. 1996 also marked the year that the beloved actor suffered a stroke which partially impaired his ability to speak. On December 9th, Douglas will celebrate his 98th birthday.

Donald Keefer - 98 years old

Actor, Donald Keefer just recently celebrated his 98th birthday on August 18. He made his film debut in the 1951 film, Death of a Salesman. His longest role was his appearances on the television series, Gunsmoke between 1957 and 1973. Keefer also had small roles in films that included, Butch Cassidy and the Sundance Kid, Sleeper and Liar Liar. The actor is also a founding member of The Actor's Studio, a membership organization for professional actors and theatre directors.

Olivia de Havilland - 98 years old

Actress, Olivia de Havilland has had quite the career in Hollywood, starring as Melanie Hamilton in Gone with the Wind and winning the Academy Award for Best Actress twice. She won her first Oscar for her role in the 1946 film, To Each His own and she won the second Oscar for her part in the 1949 film, The Heiress. De Havilland carried on a famous feud with her sister and fellow actress, Joan Fontaine.

Fontaine passed away last year at the age of 96. In 2008, President George W. Bush presented de Havilland with the National Medal of Arts. On July 1st, the actress celebrated her 98th birthday.

Luise Rainer- 104 years old

Actress, Luise Rainer is best known for her role in the 1936 film, The Great Ziegfeld. The film was one of the biggest successes during the 1930s and is still recognized as one of the greatest musical biographies to be made in Hollywood. Rainer's performance in the film won audiences over, which resulted in her winning an Academy Award for best actress for her role in the film.

The following year she starred in, The Good Earth, which landed her another Oscar for best actress. Despite her sudden success, Rainer ended up quitting Hollywood in 1938 and went over to Europe to aid victims in the Spanish Civil War. On January 13, 2014, the award-winning actress celebrated her 104th birthday.