Kelly’s disappearance from That ’70s Show in the middle of season 3 was due to a couple of factors. The series had raised her profile, which resulted in her landing roles in features like Kill the Man and Clubland (both in 1999), and she also popped up in a couple of TV movies. Dealing with her burgeoning fame, however, may have taken a toll; in a 2012 interview with ABC News, she said that she suffered a miscarriage during her tenure on That ’70s Show, and that this hardship had led her to develop a drinking problem.
After she was booted from the series in 2001, she appeared in only one project — the 2002 TV movie Alikes — before returning to the role of Laurie in 2003, having seemingly gotten her act together. Unfortunately, her comeback was short-lived; she lasted only a handful of episodes, appearing for the last time in the season 5 finale, in which her character married Fez (Wilmer Valderrama) so he could avoid being deported.
The season ended on a cliffhanger, as his daughter’s unexpected marriage to the “foreign kid” caused Red to have a heart attack — but when the storyline resumed in the first episode of season 6, viewers were shocked to discover that Kelly had departed once again, and all indications pointed to the fact that this time, she wouldn’t be back.
Written by: Looper