Fraternal twins: a son Jason & a daughter Jodi (b. 14 February 1956). Jason was named after the actor Jason Robards and Jodi was a combination of their names: Joel & Dianne.
She has 4 grandchildren: One of whom, Jordan Matheson Rowe, was named after the writer Richard Matheson. Richard Matheson lived next door to Ms. Foster when she resided in Hidden Hills, California. As a result, her son Jason grew very fond of the entire Matheson family.
She holds dual citizenship: Canadian & American.
She is a very talented and accomplished painter/artist.
She is of Ukranian descent.
Was asked to play the part of Fred MacMurray's new wife for the hit TV show "My Three Sons" (1960). She turned the part down in order to stay at home with her 3 children. The part was eventually played by the actress Beverly Garland.