Ashton Kutcher, in tonight’s episode, reunites onscreen with former That ’70s Show costar Mila Kunis, in a plot that has his Walden falling madly in love with her one-shot guest role of Vivian. On That ’70s Show, they played on-again-off-again boyfriend and girlfriend Kelso and Jackie – Jackie being a role for which Kunis auditioned when she was only 14. In real life, Kutcher and Kunis are now engaged. Call it typecasting – of the long-dormant variety.