Unlike Vanity Fair, this time she's playing a real character and there was no shortage of research material, she says, although both the singer and his wife died in 2003.
"Every journalist from Nashville sent me their tapes and their stories. Their children even allowed me to walk through their mother's closet and see her personal stuff.
"The support for this project has been amazing," Reese reveals.
The actress herself admits she finds it strange to be considered a celebrity herself.
"I'm still befuddled by the interest. I can't believe anyone is that interested, particularly of the pictures of me at the grocery store or the preschool. I mean, I'm wearing the same sweatsuit. Who's interested in that?"
The daughter of a military surgeon father and nurse mother, Reese (her mother's maiden name) tries to keep her own family out of the headlines.
"As far as being in the spotlight, a lot of that is about how much you put yourself out there. It's not like we go to every celebrity function, we really try to maintain our privacy."
The important thing is not to let your screen image be abused, she maintains.
"I say to young actresses, please think about your actions. You don't have to pose in those trashy magazines with half your clothes off.
"Trust your talent and value yourself and good things will come to you."
