Elizabeth Shaila Koshy (born March 31, 1996) is an American YouTuber, media personality and actress. Her main channel has amassed almost 17 million subscribers, and her two channels have over 3 billion views combined. She has received four Streamy Awards, four Teen Choice Awards, and a Kids' Choice Award.

Koshy began her career on Vine in 2013 before starting a YouTube channel. She made her acting debut as Aday Walker in Tyler Perry's horror comedy film Boo! A Madea Halloween (2016). She went on to star as Violet Adams in the horror drama series Freakish (2016–2017) and The Explorer in the YouTube Premium mystery series Escape the Night (2017–2019). She was also a correspondent for the MTV television series Total Request Live (2017–2018).