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Lupe's "Desperate Housewives" co-star Eva Longoria was among the famous faces ... along with Wilmer Valderrama and Edward James Olmos ... who appeared with Lupe in a Broadway play.

As we previously reported, Lupe -- who famously portrayed Selena's killer in the 1990 biopic -- passed away on July 26 ... after a battle with liver cancer.

She was 69 years old.