Kate McKinnon Berthold (born January 6, 1984) is an American actress, comedian, impressionist, and writer. She was a cast member on the NBC sketch comedy series Saturday Night Live from 2012 to 2022, where she became known for her character work and celebrity impressions. For her work on the series, she was nominated for ten Primetime Emmy Awards, including one for Outstanding Original Music and Lyrics and nine for Outstanding Supporting Actress in a Comedy Series, winning in 2016 and 2017.

McKinnon starred in the Logo sketch comedy series The Big Gay Sketch Show (2007–2010), voiced lead roles in the PBS Kids animated series Nature Cat (2015–present) and the Netflix animated series The Magic School Bus Rides Again (2017–2021), and portrayed Carole Baskin in the Peacock miniseries Joe vs. Carole (2022).

McKinnon has also appeared in numerous films, such as Balls Out (2014), Ghostbusters (2016), Office Christmas Party (2016), Rough Night (2017), The Spy Who Dumped Me (2018), Yesterday (2019), Bombshell (2019), DC League of Super-Pets (2022), and Barbie (2023).