David Hemmings

I was surprised to recently learn that before he became one of the darlings of English cinema in Blow-up and Charge of the Light Brigade, David Hemmings had a small uncredited role in Sink the Bismarck. It is listed in his film appearances on imdb.

Look for the scene on the HMS Ark Royal when a bunch of sailors gang up on Kenneth More's son - young David is sitting to the right and gets a few lines.

That's one of the benefits of big screen TVs. I've seen STB many times but never spotted David before.