"Gaga: Five Foot Two" will make its world premiere at TIFF, which runs from September 7-17.
Gaga will also perform at the festival, reported CBS News.
The film, directed by Chris Moukarbel, centres on the recording of Gaga's most recent album "Joanne", released in 2016, and the build-up to her half-time performance at the Super Bowl back in February.
"I'm known for being larger than life, but really I am just #GagaFiveFootTwo," she tweeted, following it with two teaser clips from the film.
One features her performing at the Super Bowl, and the other is a snippet of a tearful interview with a confidante named Brandon.