Shane Gilberto Jenek (born 18 February 1982), better known under the stage name Courtney Act, is an Australian drag queen, singer and television personality. Courtney first came to prominence competing on the first season of Australian Idol in 2003. After the show, she signed to BMG Australia (now Sony Music Australia), and she released her debut single, "Rub Me Wrong", which peaked at No. 29 on the ARIA Singles Chart and was certified Gold. While auditioning for Australian Idol, she became the first LGBTQ contestant to openly appear on a reality TV talent show. In 2014, Courtney was one of the runners-up in season six of RuPaul's Drag Race. Courtney is a member of the drag girl-group, The AAA Girls.

In 2014, Courtney released the extended play Kaleidoscope (2015); the title-track was the official song for the 2016 Sydney Gay and Lesbian Mardi Gras. In January 2018, Courtney appeared on season 21 of Celebrity Big Brother UK and ultimately won the series. She began branching into a hosting career, hosting The Bi Life on E! and her own television special, The Courtney Act Show. Courtney released "Fight for Love" in late 2018 for the Eurovision – Australia Decides final; she finished in fourth place. In 2019, Courtney competed and was runner-up on season 16 of the Australian version of Dancing with the Stars, where she was paired with Joshua Keefe. In 2022, Act was a judge on the ITV reality competition series, Queens for the Night.

Jenek uses the pronoun she when referring to Courtney and he when referring to himself.