Brooke Mueller and Charlie Sheen by Jeff Vespa/WireImage.com Brooke Mueller and Charlie Sheen by Jeff Vespa/WireImage.com

It's looking like marriage No. 3 for Two and a Half Men's Charlie Sheen. The film actor turned top-rated sitcom star - whom I have been said to favor, at least during my college days - successfully popped the question to Brooke Mueller, his girlfriend of 15 months, on the beaches of Costa Rica and while brandishing a $500,000 sparkler, TV's Extra reports.

What's Charlie's most recent missus have to say about the betrothal? "I am genuinely happy for the two of them," Denise Richards tells People. "In fact, I sent them flowers to congratulate them both. I've spent time with [Brooke], and my girls [daughters Lola, 2, and Sam, 3] really like her. That's all that matters to me."