But Susan Olsen, now 53, has opened up about her work in the porn industry.
She is joined by her former on-screen brothers Chris Knight and Mike Lookinland - who portrayed Peter and Bobby Brady respectively.
Pictured here with middle sister Jan left , played by Eve Plumb 'She's the oddest bird I think I've ever known,' Olsen said when speaking to also on Monday.
We are nice people like that,' she joked.
Olsen middle described McCormick right as 'extremely uptight.