She's also experienced this from the other side; Stoner herself was previously The Other Darrin to Panettiere as the voice of Kairi for Heroes-related reasons, and the Alpha and Omega sequels have Kate Higgins replacing her as the voice of Kate.
She's also worked a lot with Emma Roberts, mainly in a Neutrogena capacity (Scream 4 excepted). Fun fact: Panettiere is one of the few (if not the only one) to do productions with all three famous Robertses, having also worked with Emma's dad Eric on Heroes and her aunt Julia in Fireflies In The Garden.
Nashville almost had a reunion with her and one of her Heroes co-stars, as Jack Coleman auditioned; however, Panettiere had already been cast and the producers didn't want their previous gig to get in the way. Ironically, they ended up getting this anyway by casting Burgess Jenkins from Remember the Titans as Juliette's producer - and one of the men she beds, causing massive amounts of Squick with a generous side order of She Is All Grown Up...