David Letterman got hitched to his longtime girlfriend Regina Lasko, Us reports. The late-night host announced the nuptials during the taping of his CBS Late Show today, saying they married last week in Montana. The couple, together for more than 10 years, have a son, Harry, born in 2003. "I secretly felt that men who were married admired me… like I was the last of the real gunslingers," Letterman quipped. (More David Letterman stories.)