'Planet of the Apes' Actor I Filmed My Name During the Credits ... LIKE A NEWB!

7/12/2014 10:55 AM PDT

One of the actors in "Dawn of the Planet of the Apes" may be on the verge of breaking out due to the film's box office success ... but he's got some learning to do.

Jocko Sims -- who plays Werner in D.O.T.P.O.T.A. -- took some of his friends to watch the flick at the Grove in Los Angeles ... and on his way out, admitted to snapping a pic of his name in the credits.

Since this is Jocko's biggest role we'll give him a pass -- but just know ... Andy Serkis isn't as forgiving.