Also confirmed to take part in the event marking White's 91st birthday are Blake Shelton, Rico Rodriguez, Lily Tomlin, Sarah Silverman, Katie Couric, Vicki Lawrence, Zachary Levi, Larry King and Kate Flannery.
The program is to air on NBC Feb. 5.
"At 91 years old, White is one of the funniest and busiest actresses in Hollywood, currently starring on NBC's 'Betty White's Off Their Rockers' and TV Land's 'Hot in Cleveland,'" NBC said in a news release. "With a career that has spanned more than 60 years, the star of classic series like 'The Mary Tyler Moore Show' and 'Golden Girls' has created unforgettable roles in television and film. She has also authored seven books and won numerous awards, including those for her lifelong work for animal welfare."