After four years of dating and two kids together, Nicole Richie finally tied the knot with musician Joel Madden. The father of the bride, Lionel Richie, hosted the wedding at his 28-room estate in Los Angeles. Approximately 130 guests — including one trained elephant — attended the wedding. Nicole Richie, 29, reportedly walked the aisle in an elegant Marchesa gown and Neil Lane ring. “They wanted an Old Hollywood, glamorous feel to their wedding,” says an inside source according to PopEater.com. “Nicole wanted a memorable, elegant affair for only their closest friends and family on their special day.” We wish them all the best…