Drew Brees -- I'M A DAD AGAIN ... Wife Gives Birth to 4th Child

Who dat???? Dat's Drew Brees' brand new baby daughter!

The 35-year-old New Orleans Saints quarterback skipped practice Monday to be with his wife Brit who went into labor earlier in the day.

Few hours later and BOOM -- brand new member of the Brees brood.

Drew tweeted an adorable pic along with the caption, "Spent the early morning with our new baby girl! Brit and she are happy, healthy, and doing great! Gods greatest gift!"

So far, no word on the kid's name.

It's the couples 4th child together -- and their first little girl.