The 20-year-old is engaged to actor beau Liam Hemsworth and country queen Parton doesn't think the singer/actress could have made a better choice.
She tells In Touch magazine, "I have met him and he's a beautiful, nice boy."
And Dolly remains her goddaughter's number one fan.
She adds, "I love Miley to death, and people are mean about her all the time. She's just trying to grow up and find her spot. It grieves me when people talk bad about her. I wanna smack them. Knock it off, find something else to do. Let the kid grow up."