Talk about a crush.

Shortly before 10 am Sunday, when tickets were scheduled to go on sale for “The Book of Mormon,” the web site for the Denver Center for the Performing Arts saw unprecedented traffic — and promptly seized up, leaving frustrated ticket-buyers with blank screens and endless telephone loops.

“The web site is not down,” said Denver Center spokeswoman Heidi Bosk. “But there have been some complications because the response has been overwhelming. We are working hard.”

Bosk said the overwhelming response was due to the big buzz on the hit Broadway show, plus a local connection.

Writers Trey Parker and Matt Stone, who also created the hit television show “South Park,” are Denver-area natives. And Denver is the first stop on “Mormon’s” national tour.

“It’s very exciting,” Bosk said, who reported hundreds of fans in line at the Denver Center for the 10 a.m. box office opening. “I can’t remember this ever happening before.”

As of 10:45 a.m., there were still tickets available.

“We’ll be sure to let people know when it’s sold out,” Bosk said, who advises ticket holders to watch the web site and Twitter for updates. “Keep trying.”