AUSTIN, Texas — Tricia Helfer might have one of the creepiest fan experiences.

“I got sperm in the mail once,” the “Battlestar Galactica” actress told Page Six at the ATX TV Festival on Saturday.

Helfer, 43, recalls going through fan mail between shooting scenes of NBC’s “The Firm,” which aired in 2012.

“I opened it up and out falls this syringe,” she told us. “It came … with a stick figure drawing of a man, woman and child and it said, ‘Sending this to you now so when I come over to be together, we will already have our family started.'”

She continued, “They called the detectives and they came and took it all as evidence.”

Luckily, Helfer said, they found the person who sent it, although she didn’t say what happened to him.

Helfer, who currently stars in “Lucifer,” appeared alongside her “Battlestar Galactica” co-stars for a reunion panel at the ATX TV Festival.