CMG will commence screenings at Cannes next month; the company's new vice president of acquisitions and development Jacqui Barcos, a former colleague of Noeltner's at Miramax International, brokered the deal.
Fox International released the film last year in Latin America, where it grossed an estimated $5.3m in combined revenues. Lionsgate released in North America last year.
La Mujer De Mi Hermano stars Barbara Mori as a woman in a broken marriage who encounters a roguish young painter. Christian Meier and Manolo Cardona also star.
'It's rare to be able to acquire a picture of this quality and with such a proven track record at this stage,' Noeltner said. 'While we were in discussions with [producer Stan] Jakubowicz about an upcoming project, we asked him about La Mujer and one thing led to another.
'It will work perfectly in Europe and the rest of the world and in some ways will be riding on the wave of new Latino hits that have been performing so well internationally.'
CMG's foreign sales credits include the animated feature Hoodwinked, which has grossed more than $100m worldwide, and the screwball romantic comedy The Treatment, which won Best Made in New York Narrative Feature at Tribeca last year.
CMG also represents the Simon Wiesenthal Center's feature documentary division Moriah Films, and is currently selling I Have Never Forgotten You, a feature-length documentary portrait of celebrated Nazi hunter Wiesenthal.