Xavier Dolan-Tandros (born March 20, 1989) is a Canadian director and actor. He began his career as a child actor in commercials before directing several auteur feature films. He first gained international recognition in 2009 for his feature directorial debut I Killed My Mother (J'ai tué ma mère), in which he also starred, wrote, and produced. The film was shown at the 62nd Cannes Film Festival in the Directors' Fortnight section and won three awards from that section.

Since 2009 he has written and directed eight feature films, all of which were shown at Cannes, except for Tom at the Farm, which premiered at the 70th Venice International Film Festival in 2013, and his first English-language film, The Death and Life of John F. Donovan, which premiered at the 43rd Toronto International Film Festival in 2018. Dolan has also directed music videos, notably for Adele for her singles "Hello" (2015) and "Easy on Me" (2021), for which he received a Grammy nomination for Best Music Video.

Dolan has received numerous awards for his work, including the 2014 Cannes Film Festival Jury Prize for Mommy and the 2016 Cannes Film Festival Grand Prix for It's Only the End of the World. He has also received several Canadian film awards and César Awards.

In addition to his own films, he has also appeared in films by other directors, such as Elephant Song (2014), Boy Erased (2018), Bad Times at the El Royale (2018), and It Chapter Two (2019).