The Brazilian catwalk star gave birth to the tot on Tuesday night, and Brady confesses that the couple has yet to pick a name.
He says, "We haven't really chosen one yet."
The child is Brady's second -- he has a 2-year-old son, Jack, with former girlfriend, actress Bridget Moynahan.
In a statement, Moynahan says, "I wish them (Brady and Bundchen) the best with their baby. I'm sure my son will enjoy having a half-sibling."
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