June 6, 1963 - “My Three Sons” will become “My Three Sons” plus two, come fall. Meredith MacRae, 19, will be a regular, as will Barry Livingston (pictured), 9, the real-life younger brother of one of the present “sons,” Stanley Livingston. Miss MacRae’s role will be that of the fiancée of the eldest of the three sons, Tim Considine. Barry is cast as his brother’s buddy.
