Charlie Sheen and Denise Richards are celebrating their daughter Sam's first birthday together. The party was in the planning stages when the couple announced their formal split a few weeks ago, but they have since hosted a party at their home for friends and relatives, and appeared to be cordial with each other. The actress has filed for divorce from Sheen, although she is currently 7 months pregnant with their second child. It is expected that the divorce proceedings will eventually turn ugly, but no animosity was shown at the party. ""They want to be good together in front of their daughter", explained a friend. | 
