They've already had the special mass that begins the process.
" Each member of the 133-cardinal conclave will write his choice on a paper ballot slip, fold it once in half and carry it held aloft between two fingers to the Sistine Chapel altar, where he will deposit it in a special urn placed there."
"The votes are then counted by three scrutineers who affirm what is written on each ballot and then announce it to the conclave, so the cardinals can record the votes themselves."
Scrutineer is a cool new word for me. I'm not Catholic but I'm thrilled by the ancient traditions. More than 25,000 people are expected to gather into St. Peter's Square today.