Costume designer Karyn Wagner made about 90% of the costumes for "The Notebook," including the iconic blue dress that Rachel McAdams wears : r whatthefrockk Costume designer Karyn Wagner made about 90% of the costumes for "The Notebook," including the iconic blue dress that Rachel McAdams wears : r whatthefrockk Allie Hamilton's Blue Lake Dress The Notebook inspired Dress Review Miss MonMon Young Allie's Dress from the Notebook Musical : r findfashion RACHEL MCADAMS, THE NOTEBOOK, 2004 Stock Photo Alamy My replica of Allie Hamilton dress from movie The Notebook.