Charlie Sheen, 47, is to become a grandfather.

The former Two and a Half Men star's daughter Cassandra Estevez is expecting her first child with her husband Casey Huffman.

The couple's happy news was announced by Sheen's ex-wife, Denise Richards, who writes in a post on Twitter.com, "I guess some of you have heard... Charlie Sheen is going to be a Grampa... yes GRAMPA! His beautiful daughter Cassandra is gonna be a mama..."

The 28 year old, whose mother is Sheen's former high school girlfriend Paula Profit, married Huffman in California in 2010.