Continuity mistake: Harris was born in 1997 (in season 9) so in 2018, that makes her 21 years old, but in the 2018 revival and its spinoff "The Conners", she is depicted as 17-18 years old and attending high school.
Roseanne (1988)
1 continuity mistake in season 10
Starring: John Goodman, Laurie Metcalf, Johnny Galecki, Sarah Chalke, Roseanne Barr, Michael Fishman
Revealing mistake: Shortly after the fight with Becky, Roseanne asks Jackie to go across the street to get her something to drink, so she can smoke in secret. After Roseanne lights the cigarette and walks near the register, Jackie's plaid coat can be seen in the door's window as she waits for the next scene.
More quotes from Roseanne
The Courtship of Eddie, Dan's Father - S3-E13
Trivia: Ned Beatty plays Ed Conner, the father of Dan Conner (John Goodman). In real life, Beatty is only fifteen years older than Goodman.
Question: Was Sara Gilbert (Darlene) pregnant in real life when she was pregnant on the show?
Answer: No. Sara Gilbert has given birth to one child (so far) and that was in 2007.