The Rock Gifts UFC's Themba Gorimbo New Apartment, 'No More Couch Sleeping!'

Themba Gorimbo's days of living in the gym are over -- the UFC fighter now has his own place to call home ... thanks to an incredible gesture from his idol, Dwayne "The Rock" Johnson.

The movie superstar and WWE legend surprised Themba at his gym in an emotional meetup last week ... holding up on a promise he made after hearing the mixed-martial artist's story about fighting with just 7 dollars to his name.

But, as it turns out, their interaction at the gym was just the beginning of their special time together ... 'cause Themba's hero had something else up his sleeve (even though he wasn't wearing any).

Here's how it went down -- The Rock initially said they were going to meet up with his friend, Jay, at his apartment in Miami ... but once they got to the pad, Themba would soon find out there was no "Jay."

After walking around and seeing framed family photos all over the place ... Themba quickly realized he was standing inside his new apartment!!

"I was so moved by your story," The Rock told Gorimbo. "When I found out you were sleeping on the couch in the gym ... now there's no more couch sleeping. This is your house. Welcome home!"

"Now you can bring your kids here, man, your family. This place is yours. You don't have to think about anything. The only thing you think about is your family, getting them over here, getting them with you, training, and becoming a champion."

Themba was overcome with emotion ... thanking Johnson for the act of kindness.