Marceline and Princess Bubblegum journey to the imposing, beautiful Glass Kingdom, and deep into their tumultuous past, to prevent an earthshaking catastrophe.
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Marceline and Princess Bubblegum journey to the imposing, beautiful Glass Kingdom, and deep into their tumultuous past, to prevent an earthshaking catastrophe.
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Olivia Olson , Hynden Walch , Erica Luttrell
Anna Syvertsson
Cartoon Network Studios , Encyclopedia Pictura
as Marceline
as Princess Bubblegum