Mary Katherine Gallagher

Mary Katherine Gallagher is a fictional character invented and portrayed by Saturday Night Live cast member Molly Shannon from 1995 to 2001.

Shannon first created an early version of the character when she was in school at NYU, during a comedy show directed by Madeleine Olnek.

[5] In 2024, she portrayed the character in a pre-taped video with Vice President Kamala Harris that was shown at the Al Smith Dinner.

She suffers from stage fright, but is also hyper-competitive (on one occasion, she engages in a sing-off with Whitney Houston) and egomaniacal, believing she is a "superstar".

Mary Katherine runs on stage and introduces herself, and then attempts to participate, monopolizing the spotlight until she loses her cool and does something socially inappropriate.