Kristen Angela Johnston (born September 20, 1967) is an American actress. Best known for her work on television sitcoms, she twice won the Primetime Emmy Award for Outstanding Supporting Actress in a Comedy Series for her role as Sally Solomon in 3rd Rock from the Sun. Johnston also starred as divorce attorney Holly Franklin on The Exes, and since 2018, stars as recovering addict Tammy Diffendorf on Mom. Johnston has also starred in such films as; Austin Powers: The Spy Who Shagged Me (1999), The Flintstones in Viva Rock Vegas (2000), Ice Age (2002), Music and Lyrics (2007), and Bride Wars (2009).
She is also known as Kris.