Herbert Lom
Here is an actor prolific, versatile and generally likable;
in this he plays a Mr. Zebra, a rascally and roguish fella. Mirthy,he becomes something more. I'm of the opinion he adds immeasurably to the cast of characters and there are a number to be sure. You can almost see the twinkle in his eye.
Personally, I think he is having a ball with this rather effete gentleman.