Robert De Niro Chillin With T.I.
We're told the two did NOT arrive together -- De Niro originally hit the club with a friend right when the place opened. But a few hours later, T.I. rolled in ... and when he heard the Oscar winner was in the house, he HAD to meet him.
Sources say the two got along GREAT ... and spent the rest of the night talking and "chillin' together."
We're told Trey Songz and Fabolous were also at the club ... and both made sure to go over to De Niro to shake his hand. more on this story
TMZ submitted this story.