Originally announced just as appearing in the pilot, Betty White is now a full cast member of "Hot in Cleveland." From the official word:
TV Land announced today that it has signed Emmy® Award-winning and audience-adored actress Betty White to star in the highly-anticipated TV Land PRIME Original sitcom “Hot in Cleveland” scheduled to premiere in June. Betty White will take on the role of the snarky but lovable Elka Ostrovsky, property caretaker of the home that co-stars - Valerie Bertinelli, Jane Leeves and Wendie Malick - rent after their plane makes an emergency landing in Cleveland and they decide to stay. “Hot in Cleveland” is written by Emmy® Award-winning Suzanne Martin (“Frasier,” “Ellen”) and is produced by Emmy® Award-winner Sean Hayes (“Will & Grace”) and Todd Milliner of Hazy Mills Productions. “Hot in Cleveland,” a TV Land PRIME original production has been picked up for ten episodes and is the network’s first venture into scripted comedy series.
Another NE Ohio connection for White is her guest-starring on Our Own Patricia Heaton's sitcom "The Middle." From ABC:
Multiple Emmy Award winner and social media sensation Betty White will guest star in the season finale episode of "The Middle," which will air in May. "The Middle" airs WEDNESDAYS (8:30-9:00 p.m., ET) on the ABC Television Network and stars Emmy winner Patricia Heaton. . . . Ms. White will play a school librarian who confronts Brick (Atticus Shaffer) over his failure to return numerous overdue books.
And, of course, she is hosting "Saturday Night Live" on May 8.