Charlie Sheen Takes on Toronto Task: Organizes Bipolar Awareness Walk

Charlie Sheen is taking on a new cause. The actor, who's currently on his "My Violent Torpedo of Truth" tour, has been Tweeting all morning about a bipolar awareness walk he is organizing in Toronto tonight.

Charlie has urged fans to meet him at his hotel and walk with him 1.2 miles to Toronto's Massey Hall, where he is set to take the stage tonight to perform.

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Charlie posted a series of Tweets this morning about the walk:

• Bipolar Awareness Walk!! Come join me at 6pm and walk with me from The Ritz Carlton to Massey Hall..! Show your support..!! #BIWINNING ybw

• Looking for all of you tonight at 6pm @ The Ritz to Walk to Massey w/me in support of Bipolar Awareness! I'm matching all donations $ for $

• Taking donations tonight for O.B.A.D. THE ORGANIZATION FOR BIPOLAR AFFECTIVE DISORDERS through CanadaHelps.org I'm matching all Donations!!

• Stop the Stigma!! Bipolar Awareness Walk!! Please join me at 6pm at the Ritz tonight! Raise Money! Raise Awareness! #BIPOLAR #BIWINNING

So why has Charlie suddenly decided to join the cause?

"Apparently someone at a show brought it to his attention," a source told ABC News.com, adding that the actor's walk doesn't have "anything to do" with the actress Catherine Zeta-Jones, 41, who announced this week that she sought treatment for Bipolar II disorder.

"Charlie decided to do this on his own," his publicist told ABCNews.com, "in an effort to create awareness of bipolar disorder."

Charlie has denied having the disorder, after medical experts have examined his media bender and said he exhibits the behavior of someone with bipolar disorder, with symptoms including being prone to manic highs and depressive lows.