The 41st Toronto International Film Festival has officially begun.

And with it comes some serious star power. Some of the actors expected to attend this year's festival include Denzel Washington, Ethan Hawke, Mark Wahlberg, Ryan Gosling, Nicole Kidman and Amy Adams.

And of course, with that many big names in Toronto, many people are taking to social media to share their celebrity spottings.

Here's a look at some of those sightings so far.

This fan says she spotted Anne Hathaway at Toronto's Old Spaghetti Factory, an Italian family restaurant on the Espanade, before the premiere of "Colossal."

Canadian star Sandra Oh, who voices a character in the animated film "Window Horses," also made an appearance Friday.

 

#SandraOh at #TIFF16 with #Catfight and #WindowHorses.

A photo posted by Mr. Will Wong �� (@mrwillwong) on

"Snowden" actor Zachary Quinto braved Toronto's drizzly weather Saturday and snapped a couple photos with fans.

 

#ZacharyQuinto at #TIFF16 for #Snowden.

A photo posted by Mr. Will Wong �� (@mrwillwong) on

Joseph Gordon-Levitt unwinded in style at Lavelle, a rooftop lounge known for its outdoor swimming pool, for the "Snowden" afterparty. (No reports that he went for a dip.)

Leonardo DiCaprio at the premiere of Before the Flood on Friday.

Leo himself tweeted his excitement to be at TIFF.

Kiefer Sutherland

The actor was spotted on a hot subway in Toronto on Thursday (although it's unclear if he's in Toronto for TIFF or because he's been filming his new TV series “Designated Survivor” in the city).

The poster then tweeted this picture of the encounter.

Other star sightings....

Dakota Fanning in town to promote her film Brimestone.

Dakota Fanning

Joseph Gordon-Levitt in town to promote his film Snowden.

Jospeh Gordon-Levitt

 

When @jamesfrancotv enters the party... People get excited! :) #ambigala #tiff16 #tiff2016 #tiff @ritzcarlton #toronto

A photo posted by Vanessa Ortali (@iamvanessao) on

But it's not just fans that are excited about TIFF, stars are too.

The mayor of Toronto, John Tory, also took to social media to weigh in on TIFF.

And as the Festival gets off the ground, Twitter has released the following information about exactly who and what people want to see this week at TIFF.

Most Tweeted about stars expected to attend the festival

• James Franco

• Kristen Stewart

• Mark Wahlberg

• Ewan McGregor

• Michael Fassbender

Most Tweeted about festival films

• In Dubious Battle

• Okafor's Law

• 93 Days

• Free Fire

• The Birth of a Nation

source: Twitter