Charlie Sheen Twitter Rant - On Father's Day, actor Charlie Sheen seemed to be harboring some complicated feelings towards his ex-wives. Instead of celebrating, the 49-year-old "Two and a Half Men" star vent out about Denise Richards and Brooke Mueller on Twitter.

In Charlie Sheen's shocking Twitter rant, he directed his anger at his second ex-wife Denise Richards, who is the mother of two of his kids. According to E! News, Sheen reportedly started his social media tirade on Sunday afternoon, where he first praised his third ex-wife, Brooke Mueller, before slamming Richards.

"Brooke M is a sexy rok star whom I adore D Richards a heretic washed up piglet Shame pile Happy Father's Day!!!" Sheen wrote.

Charlie Sheen's insulting Twitter rant didn't stop with just one tweet. Daily Mail reported that Sheen's social media slurs got worse after he wrote a verbose "open letter to the media" where he bad-mouthed Richards by angrily calling her a "despicable charlatan," "worst mom alive" and an "evil terrorist."

Despite her ex-husband's cutting words, Denise Richards proved that she was taking the moral high ground when she responded by simply wishing Charlie Sheen a "Happy Father's Day," Irish Mirror noted.

"Happy Dad's Day! @CharlieSheen have a great trip in Mexico!" she tweeted. "Kids were disappointed u weren't here for it-Hey we'll celebrate when u r back!" And in one final message, Richards re-tweeted a post from her friend Leeza Gibbon.

"Negative people have a problem for every solution. Ignore them if you can," the post read, which she captioned, "Yup ain't that the truth."

It is still unclear what really provoked Charlie Sheen's foul-mouthed Twitter rant. However, Xposé has learned that Sheen was furious at Denise Richards after she denied his last minute request to take their daughters, 11-year-old Sam and 10-year-old Lola, to Mexico.

"Charlie didn't know it was Father's Day until Sunday and decided he wanted to take Sam and Lola to Mexico," a source told Radar Online. ''He acted out after being denied the outlandish request."

In spite of Charlie Sheen's controversial Twitter rant, Denise Richards simply killed her ex's offensive slurs with kindness. Way to go, Denise!