Nichola Petra "Niky" Wardley (born 11 August 1973) is an English actress. She trained at the London Academy of Music and Dramatic Art. One of her best-known parts was in The Catherine Tate Show as Lauren Cooper's best friend Lisa "Liese" Jackson, as well as other parts during the series. In November 2013 she appeared in the one-off 50th anniversary comedy homage The Five(ish) Doctors Reboot. In 2016 she was cast as Miss Brahms in the one off special of Are You Being Served celebrating BBC Comedy. In January 2019 Wardley played Kate Herbert in the BBC1 hospital drama Casualty.