Jennifer Aniston, Justin Theroux Send Out Joint Christmas Cards

It's official. Things are getting extremely serious for Jennifer Aniston and Justin Theroux.

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Not only are the two reportedly living together, but the couple -- who have been dating for seven months --  just sent out a joint Christmas card embossed with both their names.

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In lieu of Christmas presents, the happy couple sent out a red embossed card that lets the recipient know that a donation has been made in their names to some charities. 

The card reads: "We wish you and your family a holiday season full of happiness & joy. A donation has been made in your name to St Jude's Children's Research Hospital and Best Friends Animal Society."

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"With warmth and love, Jen and Justin."

To top it off, Aniston, 42, and Theroux 40, are reportedly spending the holiday with her father, former Days of Our Lives star John Aniston and his wife.

Could Justin be the "one"?  Guess we'll know if the next card they send out is a wedding invitation.