TTC Chairman Adam Giambrone has filed his nomination papers on Monday morning at City Hall to become Toronto's next mayoral candidate.

Giambrone filed his paperwork after 11 a.m. and will kick off his campaign tonight with a party to "Celebrate Toronto" at Revival.

He's been promoting the party since last weekend when he emailed an invitation to supporters and posted a YouTube video mocking the "run" for the top job.

Candidates already in the race include former deputy premier George Smitherman, Joe Pantalone, Rocco Rossi, Giorgio Mammoliti and Sarah Thomson.