Host Couric welcomed actresses Mary Tyler Moore, Valerie Harper, Cloris Leachman, Betty White and Georgia Engel, who all appeared on the Emmy-winning sitcom set in Minneapolis.
The five actresses just reunited for an upcoming episode of White's TVLand series "Hot in Cleveland." That episode will air in September.
Harper, who played Rhoda on "The Mary Tyler Moore Show," revealed last month that she is battling brain cancer. Harper's MTM co-stars recently expressed their affection for her.
To watch clips from the "Katie" reunion, click below.
