Alicia Silverstone is clueless about what she just ate, and fans are worried.

The "Clueless" star, 47, in a TikTok video on Monday bit into a fruit she found on the street in England and asked her followers to help identify it.

"It was on the street and we were discussing whether this was a tomato or not. It's definitely not, because look at these leaves," she said in the clip, showing the plant where the fruit came from. "... So what the heck is this?"

As she took a bite of the fruit, Silverstone said, "I don't think you're supposed to eat this. It's almost like a pepper. Does anyone know what this is?"

In the comments, fans speculated that the plant may have been a solanum pseudocapsicum, also known as Jerusalem cherry. According to Gardening Know How, the Jerusalem cherry houseplant's fruit is "toxic," and "any part of the plant that is ingested can cause poisoning and even death."

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Eating a few berries or leaves from a Jerusalem cherry may cause a person to feel sick, throw up or have diarrhea, while eating a larger amount could cause drowsiness, hallucinations or heart rate problems, the Northern New England Poison Center says.

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USA TODAY has reached out to representatives for Silverstone.

"Jerusalem Cherry … They are poisonous," one fan commented on the TikTok, receiving more than 6,000 likes.

Other fans questioned why the actress would have eaten something that she hadn't identified in the first place.

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"Eating random stuff from bushes when you don't know what it is, is a level of non anxiety that I can only aspire to," one commenter joked, while another asked, "Who just picks something they don't know what it is and eats it."

Roughly 20 hours after Silverstone shared her TikTok, she had not posted a follow-up video, adding to the fan concern. "Can someone tag me when we know she's OK," a comment on the TikTok said.

Silverstone also shared the clip on Instagram, where fans were equally concerned and confused, with one follower writing, "Stop eating fruits from unknown sources, ma'am."