Garth Brooks has become a first-time grandfather at 51. The country music superstar's 19-year-old daughter August and her boyfriend Chance Michael Russell welcomed a baby girl named Karalynn in Oklahoma earlier this week (begs22Jul13), and the star is overjoyed by the new addition to his family. In a statement, the 51 year old writes, "Our family would first like to thank everyone for their warm wishes and sweet celebration of Baby K's arrival. "Our children's lives have always been extremely private and they have been endlessly encouraged to be their own people. We have always wanted them to be individuals and not be known as 'someone's daughters'. I have been amazed and grateful how the press has always respected this. I now ask that respect to please continue as this young family begins the greatest days of their lives." August is Brooks' middle daughter of three from his first marriage to songwriter Sandy Mahl, who he divorced in 2001. He is currently married to fellow country star Trisha Yearwood.