Hmmm. What could Rick be thinking of? A jungle movie, with Harrison Ford and Katharine Hepburn going up the river in a motorboat, only to be met by Bo Derek and Allan Quatermain, and then attacked by Kathleen Turner and Linda Kozlowski. Does that cover all your jungle fantasies, Rick?

Those aren't it, huh? Oh, maybe those are my fantasies...

Well, could it be Gorillas in the Mist? It stars Sigourney Weaver, and is available on video. Haven't seen it myself.
Click here for information on Julia Roberts. No jungle movies on her list, but maybe they didn't list it, if it was a minor part.
-Joe-