Based upon the 2008 book of the same title, by Kristin Hannah. The sequel is called Fly Away.
The show is set in 1970, 1974, 1983, 2003 and 2005.
Katherine Heigl (Tully) was born in 1978, while Beau Garrett (who plays Tully's mother, Cloud) was born in 1982.
Chelah Horsdal (Margie) and Quinn Lord (Sean) also play mother and son in the Amazon series The Man In The High Castle (2015).
Ali Skovbye (Young Tully) and Yael Yurman (Marah) both had roles in the TV series Once Upon a Time