There could be an RG4 in Robert Griffin's future -- because the NFL star just announced his wife is pregnant with their very first child!!
Griffin -- who's celebrating his 25th bday today -- made the announcement on Twitter ... posting one of those baby announcement photos along with a caption that reads:
"BIG thank you for making this birthday a special day!!! This year's gift will change our life forever!!! #BoyOrGirl"
The photo is interesting though ... considering his wife Rebecca seemed to make a point to include a shot of her ring finger with her big honkin' diamond on it.
It almost seems like she's making a statement about the state of her marriage ... after reports a while back suggested things may have been rocky at home.
Or maybe she just wanted to remind everyone she's got a baller diamond.
Either way ... congrats!!
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