A source close to Charlie Sheen and his fiancé, Brooke Mueller, reveals to In Touch exclusively that they are going to marry on May 30. The couple met at a party in early 2006 not long after Charlie separated from his then-wife, Denise Richards. He proposed to the actress/real estate agent with a $500,000 ring in July of 2007. This will be the Two and a Half Men star's third marriage and Brooke's first.