Speaking of Nellie, Alison Arngrim comes from a showbiz family--her father was an actor, and her mother was a voiceover actress (Gumby, Casper). And her brother, Stefan (who we now know, sadly, through her book, sexually abused her when she was a child) was a child actor as well.
Here are some soap ones:
Kristen and Eddie Alderson on One Life to Live. Kristen joined the show in 1998 as Starr (she was almost seven), and Eddie joined the show as Matthew in 2001--mainly because he was often on set with his mom while his sister was shooting the show. I remember for years people would say that he wasn't anywhere near as good as his sister, but now that they're older, that sentiment seems to have reversed.
The Bell family:
Lauralee (Bill & Lee's daughter, Y&R actress)
Brad (Bill & Lee's son, B&B HW/EP)
Bill Jr. (Bill & Lee's other son, president of the Bell production companies)
Maria Arena Bell (Bill Jr.'s wife, co-HW/EP of Y&R)
OLTL's James & Kassie DePaiva's son, JQ, appeared on AMC in 2007 as a guest on Erica's talk show, as an inspiration for Kendall's son Spike when he went deaf (JQ has a cochlear implant in real life).
Similarly, I read once that Dreama DePaiva (James' daughter with his ex-wife, Hee Haw Honey Misty Rowe) appeared in a play once with her mother.
Father Knows Best's Lauren Chapin has two older brothers: former child actors Michael and Billy Chapin (Billy played the little boy in Night of the Hunter). According to her E!THS, their mother favored Billy over the other kids, especially Lauren, and she would often have Billy torture Lauren on purpose when they were kids (with Billy once locking Lauren in the basement for hours, only letting her out once their mom got home). And to make matters worse, her father sexually abused her as well. I think she and Billy made up later on, though, given how his mother manipulated him growing up.
The Wonder Years had sisters Danica (Winnie) and Crystal (Becky Slater) McKellar, which is hilarious as they look nothing alike (even though they're full siblings).
Soleil Moon Frye (Punky Brewster, Sabrina) and her half-brothers: Meeno Peluce (Voyagers!), and Sean Frye (he was one of the kids' friends in ET).
Lisa Whelchel's youngest daughter, Clancy Cauble, had a small role in The Facts of Life Reunion movie.
Carroll O'Connor and his son Hugh were both on In the Heat of the Night together.
Edited by UseYourIllusion, Apr 17, 2012 @ 12:29 AM.