3. JOHNNY GALECKI
You may recollect Johnny Galecki from “National Lampoon’s Christmas Vacation.” That’s correct; Rusty is in fact,the same dude who plays Leonard Hofstadter.
4. SIMON HELBERG
Because of this yearbook photograph, we realize that Simon Helberg has always resembled a dork. This makes him ideal for the part of Howard Wolowitz. Once a geek, always a geek.