'The Partridge Family' is a show that's difficult to explain to anyone who wasn't there to see it during the 1970s. Try explaining the plot or the concept to anyone now, and they'll struggle to understand what made it so special, but during the four years it aired from 1970 to 1974, everybody watched it. When they did, they fell in love with the young Susan Dey, who had the bluest eyes the world had ever seen.
The show made a star out of Dey, who was being cast in movies within two years of appearing on the show. Her first credit was in 1972's 'The Candidate,' which was a minor role. She had a much bigger part in 'Skyjacked' the same year, and by that point, she was a breakout star before she'd even turned 20.