Megan Fox has been giving multiple clues on the identity of her baby daddy, and by process of elimination it's pretty clear ... Brian Austin Green is the leading candidate.
A noticeably pregnant Megan and her estranged hubby strolled into a Santa Monica restaurant Tuesday for lunch.
It's relevant because earlier in the day Megan Instagrammed pics of 3 of her recent co-stars -- Shia LaBeouf, Will Arnett and Jake Johnson -- with the hashtag, #notthefather.
TMZ broke the story last August when Megan filed for divorce, but she's been cozy with Brian and their 2 kids recently, so it seems highly likely at the very least they're having their 3rd kid.
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