Killam told PEOPLE on the red carpet for 'SNL50: The Anniversary Special' on Sunday, Feb. 16 that he always hoped to be on the show before being casted
"They molded me into the comic actor, and the good career that I had today. I'm just grateful," Belushi said of 'SNL' and the improv comedy group, Second City
The season 1 star tells PEOPLE how she learned she'd be returning for season 3, calling the show "a once-in-a-lifetime opportunity that I got to do twice"
Ha tells PEOPLE she and Thompson have "bonded" easily already: "There's just such an openness with Luke and I think — I like to think I'm quite open with him"