Kevin Dillon -- Gronk Totally Gronked His Big Screen Debut ... In A Good Way

Gronk say line ... Gronk be funny ... Gronk dominate new "Entourage" movie like puny linebacker ... so says Kevin Dillion who tells TMZ Sports the Pats tight end KILLED IT in his big screen debut.

We got Johnny Drama out in L.A. the other day ... and he told us Gronk was THE BEST of all the jocks who had a cameo in the flick ... which is saying something considering it's packed with huge stars like Russell Wilson, Kevin Durant, and Ronda Rousey.