Matthew Lillard and Skeet Ulrich addressed one of the long-standing mysteries in the “Scream” franchise Saturday: Who was in the Ghostface costume when Tatum Riley (Rose McGowan) was killed?

During the “Scream” 30th reunion panel at Midsummer Scream in Long Beach, Calif., Lillard and Ulrich, who played knife-wielding best friends Stu Macher and Billy Loomis, respectively, in Wes Craven’s “Scream,” were asked point-blank if they knew who was responsible for the fan-favorite character’s brutal slaying.

Their answer? “To be honest, not even [screenwriter] Kevin Williamson knows who killed [Tatum]. And he wrote the damn thing,” Ulrich, who appeared alongside original “Scream” stars Lillard, Jamie Kennedy, Joseph Whipp, as well as stunt actor Lee Waddell and Ghostface voice performer Roger L. Jackson.

“And we never discussed it,” he continued. “So, it’s really fan theory, which I think is great. But, I don’t know. No one knows.”

As fans of the iconic horror film will recall, McGowan’s death is one of the more memorable ones in the movie, as she’s killed by a closing garage door while trying to escape the Ghostface killer – who is later revealed to be two people (the aforementioned sinister BFFs).

Over the decades, it has never been formally confirmed whether Lillard’s Stu or Ulrich’s Billy dealt the final blow to Tatum, with fans making cases for both bad guys online.

However, Lillard indicated that he believed his character was responsible for the slaying, telling the crowd at the famed horror convention, “I always say it’s because she said ‘no’ to going to prom.”

This wasn’t the only behind-the-scenes tidbit shared during Saturday’s panel, as Lillard and Ulrich recalled how demanding the final sequence of the movie was to film.

The 42-minute stretch, known as “Scene 118” or the house party face-off, required 21 consecutive night shoots to complete.

“When you see the film, the energy that he and I and Neve [Campbell] and everybody is producing, we had to do daily for all that time,” Ulrich shared. “So, that sticks out to me as being most memorable. And fun, because I got to hit [Lillard] with a phone.”

Lillard co-signed this comment, chiming in with, “We shot at night. So, we were living a nocturnal life. And also, back then, we only had one camera … you would have to do a take on every angle, every set-up multiple times. So, that sequence is really brutal and stands out in my memory.”

Fans will get to see this iconic sequence on the big screen again this fall, as Paramount Scares, the dedicated horror brand for Paramount Pictures, confirmed at the panel that the movie would be re-released in theaters in October in honor of the 30th anniversary.

Sunday is family day. So, it just made sense for the 79th edition of the Locarno Film Festival to book Paper Tiger, written and directed by James Gray and starring Adam Driver, Scarlett Johansson and Miles Teller, for Sunday evening. After all, the loosely autobiographical movie tells the story of a suburban family that becomes entangled with the Russian mob.

Just before the Paper Tiger screening, Gray received the Career Leopard honor from the Swiss festival in a moment that seemed worthy of a big cat pun.

Looking out at the city’s big central square, the Piazza Grande, which seats 8,000 people, the U.S. auteur shared the mix of excitement and nervousness that he was feeling.

“I didn’t expect this crowd. I sort of feel like I’m in the Beatles or something,” he told the big crowd. “This is very strange. I’m very nervous because usually I’m behind the camera and I’m yelling at other people to do things and telling them what to do. And now I’ve got to do some talking. It’s vaguely terrifying.”

Gray also called the experience “very moving,” before resorting to some deadpan humor. “When I told my wife, I said, ‘Hey, they want to give me this prize in Locarno,’” the filmmaker shared. “My wife said, ‘That’s very nice. Now, can you take out the garbage?’”

Continued the U.S. honoree: “So this … gives you a kind of perspective in life. But my wife’s feelings aside, it’s very moving to me.”

Continuing with the family theme, Gray told the Locarno outdoor audience about Paper Tiger: “You’re going to see pretty much where I grew up. A lot of it is autobiographical. You’ll see my neighborhood, and you’ll say, ‘Oh my God.’ Because I got here with this [award], and I came from that.”

Gray also concluded that just because he received this year’s Career Leopard, film fans shouldn’t write him off yet. “I’m not old,” he said. “I have many good films, hopefully, left, and maybe better. So don’t age me out yet.”