Sandra Bullock's "Adopted" School Has 100-Percent Grad Rate!

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Sandra Bullock is one proud mama!

New Orleans' Warren Easton Charter High School -- which she "adopted" in 2007 -- is celebrating a 100-percent graduation rate among its 220 senior class, Bullock's rep told CNN.

The icing on the cake: The high school grads have also snagged $4,625,100 in scholarship money from 15 different colleges and universities.

Bullock, 46, became involved with the school after it was devastated by Hurricane Katrina. She has since contributed hundreds of thousands of dollars for an on-campus health clinic, scholarships, band uniforms and auditorium renovations, her rep said.

"I cannot express how proud I am of the 2011 graduating class at Warren Easton," Bullock said of the milestone. "To achieve a 100% graduation rate just goes to show that the recipe for success lies under that roof. People who believe, people who love and support, and people who don't take no for an answer."

Added the star, who adopted her son Louis in January of last year in New Orleans: "How lucky I am to be a very small part of this great school!"