Ben Affleck reveals baby's sex

The actor and wife Jennifer Garner are expecting third child

The couple, who already have two children, 5 year old Violet and 2 year old Seraphina, have revealed the sex of their unborn baby.

The stars will be welcoming a baby boy at the beginning of 2012. According to insiders Affleck is over the moon at the thought of having a "sports buddy".

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