AJ McCarron to Katherine Webb -- Go Ahead, Get Famous

Alabama's all-star QB AJ McCarron is no longer leading the charge against his hot GF's meteoric rise to fame -- in fact, we're told AJ now fully supports Katherine Webb's burgeoning Hollywood career.

Sources close to Katherine tell us, AJ has given Katherine the green light to go full Hollywood -- despite previously encouraging her not to make public appearances.

As we reported, Katherine has already signed up to do a new reality show called "Celebrity Diving" (about celebrities ... diving ... into water) and she's also slated to cover the Super Bowl for "Inside Edition."

We're told AJ fully supported both deals -- even though he previously expressed concerns that Webb might steal the spotlight from Alabama's success.

But now that Alabama's season is over, AJ has changed his tune -- and we're told Webb's hired a publicist and a manager to book her around town.

And with AJ heading back to college for another year of paycheck-free football (while risking injury), somebody has to wear the pants in that relationship ...