Sue Costello (born April 2, 1968) is an actress, comedian, writer and producer from the Savin Hill area in the Dorchester neighborhood of Boston, Massachusetts.^[1]

Costello starred in the self-titled television series Costello on Fox, where she was also a producer and the co-creator of the show.^[2][3][4]

Costello has also appeared on television shows such as NYPD Blue, Tough Crowd with Colin Quinn on Comedy Central, and Comics Unleashed. She was a guest host on NBC's Later,^[5] and has also performed on Comedy Central's "Premium Blend".^[6]

Costello has appeared in the films Southie, Once in the Life and The Fighter.^[1][5]

Costello appeared in NBC's Last Comic Standing in 2004,^[7] making it to the finals,^[5] and can be heard on Episodes 172 and 936 of Marc Maron's podcast, WTF.^[8][9]

Costello wrote and stars in her one-woman show, "Minus 32 Million Words"^[1][10] and launched her podcast, "The Kadoozie Kast with Sue Costello" in December 2012.^[11][12]

In Watts, California, there is an official Sue Costello day on September 29.^[13]

Costello was a frequent guest on the Jay Thomas Show, a radio show on SiriusXM Comedy Greats.