I discussed Mr Regan in an earlier post; he's one of those actors who never speaks and is supposed to be completely in the background, a cut-and-paste character in a way, like the little people in architectural drawings. He was a casting director who found his way into a lot of "bystander" work, and is pretty recognizable once you know him. (On the right.)
Mr Lucky was a crime/mystery TV program that ran for one season. These two meatballs emerge and saunter through a scene, tailing a principal- and that's it for them, they're not even characters. They're just "the Boys".
1959 seems pretty early for him. The thing about actors like this, playing parts just above the horizon of obscurity, there's very little info. Which makes them more interesting.