"Actress"@en . "2001-04-22"^^ . "Katelyn Mager"@en . "Katelyn Mager (born April 22, 2001) is a Canadian actress from Vancouver. She portrayed Young Thalia in the film adaptation The Sea of Monsters."@en . . . "Young Thalia Grace"@en . . . . . . "None"@en . . "Female"@en . . . "Katelyn Mager"@en . "2009"^^ . "Katelyn Mager"@en . . . "Katelyn Mager (born April 22, 2001) is a Canadian actress from Vancouver. She portrayed Young Thalia in the film adaptation The Sea of Monsters."@en . "Canadian"@en . . . . . . . . . . .