Then: Lisa Robin Kelly – a.k.a. Laurie Foreman
Eric’s slightly crazy older sister was played by Lisa Robin Kelly. The character was spunky and outspoken and you never knew what she was going to say or do. And it turns out that Kelly’s real life wasn’t that far off from the one she portrayed on screen. According to reports, she was struggling with addiction issues and it ended up affecting her performance. After frequently missing rehearsals, Kelly was finally given the ultimatum of either clean up or get out.