Gabby Douglas -- I'm the New Face of Corn Flakes!

What do corn flakes, milk and Gabby Douglas have in common? They'll all be featured on Kelloggs cereal boxes this fall ... 'cause the Olympic champ just inked a major endorsement deal with the cereal company!

After sweeping the women's All-around gymnastics final and being the first African-American to win a gold medal in the category ... Gabby went on the "Today" show Friday and announced the major cereal deal.

The 16-year-old will be the face of Kelloggs Corn Flakes starting this fall, so every American can wake up feeling like a champ.

This is the first of many deals Gabby is likely to sign on to ... she made history with her gold medal and she's still young enough to compete in the 2016 Games in Rio de Janeiro, Brazil ... which could mean many more deals to come.

Fun Fact: Kelloggs also tapped Michael Phelps to be on their boxes back in 2008 after he killed in in Beijing.