Dwayne "The Rock" Johnson is sending his love and support to "The Challenge" star Ashley Cain ... as doctors say his 8-month-old daughter only has days to live.
Ashley and his wife posted the video message Dwayne sent to them just days after they got the heart-wrenching prognosis for their baby girl, Azaylia. The Rock said, "Brother, I'm so sorry to hear this news. My heart breaks for you."
But, he also sent words of encouragement, saying ... "You tell that little lion I said, 'Let's go Champ, and to stay strong.