Us Weekly. “Not necessarily while we were filming.”“I dated Maureen [McCormick], and Chris [Knight] dated Eve [Plum] and Michael [Lookinland] and Susan [Olsen] had a little mock wedding at one point. So, yes, we all hooked up,” he added.While Williams said the “hook-ups” were solely among the younger stars, he did have a “teenage crush” on his TV mom, the late Florence Henderson.