Anna Paquin and Stephen Moyer's twins' names revealed
However, at the Season 6 premiere for their HBO vampire drama, Moyer referred to the twins by their names to E! News -- the little boy and girl are named Charlie and Poppy.
Moyer says that while his 10-year-old daughter Lilac (from a previous relationship) is away at camp, he plans to spend Father's Day with Anna and the twins and that's when he accidentally revealed their names.
Paquin adds, "I can't tell you [about Father's Day plans] because that would ruin the surprise. I don't know about [it being a] big surprise, but yes, there are plans."
"True Blood" returns to HBO on Sunday, June 16.