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Cam Newton has a new reason to celebrate.

The Carolina Panthers quarterback and his longtime girlfriend, Kia, welcomed a baby boy to their family last week. The NFL MVP favorite took to Twitter on Wednesday to announce the news.

The baby boy was born on Christmas Eve, sources told ESPN's David Newton, which explains why the QB left practice early that day.

Newton also tweeted out an explanation for why he waited to announce the news.

Thumbnail photo via Dale Zanine/USA TODAY Sports Images