‘;Marian’; is a new variety of rhododendron. This variety was produced by the hybridization of the ‘;Stardust’; variety with the ‘;Hagoromo’; variety in 2010. The plant may be used, e.g., as a flowering plant for outdoor cultivation, or as a potted plant. ‘;Marian’; is visibly appealing, and produces flowers comprising a corolla that comprises vivid purple-pink and light purple-pink colors.