True Blood costar Anna Paquin and Stephen Moyer finally let slip the name of their 9-month-ol d twins during a press event for the season six premier of the hit HBO series.

Moyer discussed his plans for Father’s Day with E! News, noting that his daughter Lilac,10, was off to camp, but explained that he and Paquin planned on “hanging out with Charlie and Poppy.”

Paquin wouldn’t reveal exactly what her plans are for Moyer’s special day, noting that it was a “surprise.”

Paquin and Moyer, who met on the set of True Blood announced that they were expecting in April 2012.

Only four months later, True Blood costar Sam Trammell revealed that the couple weren’t expecting one baby, but twins!. At the time he revealed, “We sent them a special gift. It's so interesting that True Blood has become, like, the 'twins' show .”

Paquin and Moyer welcomed babies Charlie and Poppy in September 2012; at the time the couple would not reveal the names or genders or their new baby twins.