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THE BRADY BUNCH - "The Babysitters" - Season Two - 10/2/70 Greg and Marcia were left in charge of their younger brothers and sisters when Alice (Ann B. Davis), Mike and Carol had plans for the evening. (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)

THE BRADY BUNCH - "The Babysitters" - Season Two - 10/2/70 Greg and Marcia were left in charge of their younger brothers and sisters when Alice (Ann B. Davis), Mike and Carol had plans for the evening.  (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)

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THE BRADY BUNCH - gallery - Season Five - 9/14/73 Pictured, top row: Christopher Knight (Peter), Barry Williams (Greg), Ann B. Davis (Alice); middle row: Eve Plumb (Jan), Florence Henderson (Carol), Robert Reed (Mike), Maureen McCormick (Marcia); bottom row: Susan Olsen (Cindy), Mike Lookinland (Bobby) (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)

THE BRADY BUNCH - gallery - Season Five - 9/14/73 Pictured, top row: Christopher Knight (Peter), Barry Williams (Greg), Ann B. Davis (Alice); middle row: Eve Plumb (Jan), Florence Henderson (Carol), Robert Reed (Mike), Maureen McCormick (Marcia); bottom row: Susan Olsen (Cindy), Mike Lookinland (Bobby)  (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)

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UNITED STATES - OCTOBER 28: THE BRADY BUNCH - Ann B. Davis gallery - Season Two - 10/28/70, Ann B. Davis (Alice), (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)

UNITED STATES - OCTOBER 28:  THE BRADY BUNCH - Ann B. Davis gallery - Season Two - 10/28/70, Ann B. Davis (Alice),  (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)

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UNITED STATES - DECEMBER 10: 5943_6 -- THE BRADY BUNCH -- 8/3/72, TRACKING #7725, The Brady family, from top: Cindy (Susan Olsen), Bobby (Mike Lookinland), Jan (Eve Plumb), Peter (Christopher Knight), Marcia (Maureen McCormack), Greg (Barry Williams), Carol (Florence Henderson, second from left) and Mike (Robert Reed). Alice (played by Ann B. Davis, third from right) was the family's housekeeper. (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)

UNITED STATES - DECEMBER 10:  5943_6 -- THE BRADY BUNCH -- 8/3/72, TRACKING #7725, The Brady family, from top: Cindy (Susan Olsen), Bobby (Mike Lookinland), Jan (Eve Plumb), Peter (Christopher Knight), Marcia (Maureen McCormack), Greg (Barry Williams), Carol (Florence Henderson, second from left) and Mike (Robert Reed). Alice (played by Ann B. Davis, third from right) was the family's housekeeper.  (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)

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UNITED STATES - NOVEMBER 05: THE BRADY BUNCH - "And Now A Word From Our Sponsor" - Season Three - 11/5/71, Alice (Ann B. Davis, left) and Carol (Florence Henderson) rehearse after the Bradys were "discovered" and asked to do a commercial., (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)

UNITED STATES - NOVEMBER 05:  THE BRADY BUNCH - "And Now A Word From Our Sponsor" - Season Three - 11/5/71, Alice (Ann B. Davis, left) and Carol (Florence Henderson) rehearse after the Bradys were "discovered" and asked to do a commercial.,  (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)