Zak Penn, who scripted “Last Action Hero” and recently helped develop the story for the DreamWorks comedy “Ants,” has signed an exclusive, two-year first-look deal with DreamWorks.“I’ve been wooing Zak like crazy since my first day on the job at DreamWorks,” motion-picture division exec Nina Jacobson said. “It’s a huge relief that this exhausting ordeal has finally paid off. I just hope he ends up being worth all that trouble.” Penn, who also scripted “P.C.U.” for 20th Century Fox, is developing the feature animation project “Fish Out of Water” as a producer. That project, already set up at DreamWorks, was written by Marc Hyman. Penn also has the script “Suspect Zero” at Universal. Penn is repped by Endeavor and attorney Jason Sloane.