Donna has come a long way by the time of "That '90s Show," and the same goes for Prepon as well. As she has admitted, when she got started on "That '70s Show," she scarcely knew how to act.
The first three seasons of the beloved Fox sitcom "That '70s Show" featured Lisa Robin Kelly as Laurie Forman, the extremely promiscuous, manipulative, vindictive older sister of Eric Forman (Topher ...