Prepon played the ultimate tomboy next door as Eric's neighbor and girlfriend, Donna. After eight "'70s" seasons, she jumped right back into series TV with ABC's short-lived dramedy "October Road." A number of guest roles followed ("How I Met Your Mother," "Castle"), but earlier this year, Prepon finally returned to her sitcom roots (and dyed her roots, apparently) to play a young Chelsea Handler on NBC's "Are You There, Chelsea?" (Will "Chelsea" still be there next season, though? That's the real question.)
'That '70s Show': Where Are They Now?
Throw on some polyester and fire up the 8-track as we take a look at what the "'70s Show" cast is up to these days