VIDEO: The Cast of THE MARY TYLER MOORE SHOW Reunite on GMA

ABC's Katie Couric sat down with the cast of the iconic TV sitcom THE Mary Tyler Moore SHOW on a segment of this morning's 'Good Morning America.' The cast, including Mary Tyler Moore, Betty White, Cloris Leachman, Valerie Harper and Georgia Engel will reunite for a special episode of TV Land's 'Hot in Cleveland.' Check out the segment below!

Harper, who was recently diagnosed with an inoperable brain tumor, explained her positive outlook on life, "We're progressing, I certainly see what's ahead, what could possibly be tomorrow," says the actress, who jokes, "In fact, I'm hoping I get through Friday!"

Adds her co-star Betty White, "But I want to tell you my dear, my money's on you. Her positiveness, everything is on the upside. And that's 90% of it!"

The Mary Tyler Moore Show was created by James L. Brooks and Allan Burns and aired on CBS from 1970 to 1977. The program was a television breakthrough, with the first never-married, independent career woman as the central character. As Mary Richards, a single woman in her thirties, Moore presented a character different from other single TV women of the time. She was not widowed or divorced or seeking a man to support her.

It has also been cited as "one of the most acclaimed television programs ever produced" in US television history. It received high praise from critics, including Emmy Awards for Outstanding Comedy Series three years in a row (1975-77), and continued to be honored long after the final episode aired.