Mary Katherine Gallagher is a fictional character invented and portrayed by Saturday Night Live star Molly Shannon.

Mary Katherine is a sardonic caricature of an unpopular, teen Catholic school girl. She is prone to comically severe bipolar mood swings, alternately hyper-active and ponderous. Also, she would suffer from stage fright yet try and take over the spotlight from others who she became intensely competitive with and jealous of (as a result of her innate belief that she is a "superstar"). superstar, super star, mary katherine gallagher, molly shannon, saturday night live, character, funny, picture, poster, superstar poster, humor, comedy, jokes, ecards, classic, teenager, crazy, insane

"These are my BREASTS. They're so BIG. I need a BRA to strap them and support them because they're so HUGE they need to be hooked and strapped for support. My big boobs, this one is bigger than this one 'cause it's the mommy and that's the baby. And this one is very nice to this one and they hold hands because they're FRIENDS!" ~Mary Katherine Gallagher
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