Charlie Sheen has become a grandfather at the age of 47. The Wall Street star's daughter, Cassandra Estevez, has given birth to a baby girl named Luna and the former Hollywood wild man is overjoyed. He tells TMZ.com, "It's impossibly a most wondrous day." Little Luna is 28-year-old Estevez's first child with her husband Casey Huffman. Estevez's mother is Sheen's former high school girlfriend, Paula Profit. The actor has four other young children from his failed marriages to Denise Richards and Brooke Mueller.