Saturday Night Live (SNL) actors sometimes can't control their laughter during rehearsals and even live on camera as the show is aired live Saturday nights and when they do, it is hilarious.

Saturday Night Live is a television sketch comedy/variety show that airs live on NBC Saturday evenings usually after late local news.  SNL first premiered October 11, 1975, under the original title NBC's Saturday Night.

This video collage of actors laughing on stage and in many cases funnier than the original scripts.

SNL Stars Losing It