Gisele Bundchen's twin sister is to wed in Porto Alegre, Brazil on Saturday - 13 months after the supermodel married New England Patriots quarterback Tom Brady.

Patricia Bundchen, who is also Gisele's manager, will exchange vows with her fiancee at the Laurentia Vineyard with her famous sister among guests.

X17.com reports the model will take three-month-old baby son Benjamin back to Brazil with her for what will be his first trip abroad.

Bundchen & Brady wed on February 26, 2009.

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