Believe it or not -- Charlie Sheen is a grandpa.
The star's 28-year-old daughter Cassandra Estevez gave birth to a baby girl named LunaWednesday. Of becoming a grandfather, Charlie tells TMZ, "It's impossibly a most wondrous day. My bucket list is a thimble!"
In January, David Letterman asked the actor if he thought he'd be a good grandpa, Charlie quipped, "Well, yeah, because you can leave the kid!"
Cassandra is Charlie's daughter with high school sweetheart Paula Speert.
The 47-year-old Anger Management star is also dad to daughters Sam, 9, and Lola, 7, with second wifeDenise Richards, and 4-year-old twin sons, Bob and Max, with third wife Brooke Mueller.