Photos and VideosMore Photos and Videos
UNIVERSAL CITY, CA - JUNE 06: Bradley Cooper (L) and Betty White speak onstage at the 2010 MTV Movie Awards held at the Gibson Amphitheatre at Universal Studios on June 6, 2010 in Universal City, California. (Photo by Christopher Polk/Getty Images)
In the announcement posted Wednesday on the association's website, White says promoting animal well-being is the most important thing she does.
She has worked with the zoo for 46 years and was honored at June's Beastly Ball by the association, a nonprofit that raises money for the zoo and its causes.
Mayor Antonio Villaraigosa named her "Ambassador to the Animals of the City of Los Angeles" in 2006.
White has had a high-profile year that has included a buzzed-about hosting gig on "Saturday Night Live," the new TV Land series "Hot in Cleveland" and a lifetime achievement award from the Screen Actors' Guild.