Chrissy Teigen thought she had a long-lost identical twin after taking a DNA test and the entire story is a wild ride

• In an Instagram post, Chrissy Teigen said for a moment, she thought she had a twin.
• She had taken a DNA test on 23andMe and was told she had an identical twin.

Chrissy Teigen has always been open with fans about her personal life, but for a brief moment, even she was surprised by her DNA results.

The cookbook author and model said on Monday that after taking a 23andMe DNA test, the results showed that she had "an identical twin."

"As some of you know, I've been on a bit of a journey for the past few years (but especially the past year) of health and wellness and trying to figure out a lot about my past and my family," she said on Instagram. "Just typical stuff we're all curious about."

As a part of this journey, Teigen, 37, said her therapist and doctor supported her to take a DNA test to learn more about herself.

She said while she had done 23andMe before, she had only "done a heritage thing." 23andMe has three different services, the most basic tier being an "Ancestry Service" for $99 that includes relative finders and geographic regions, whereas the additional services become more comprehensive and include health reports.

So Teigen said she paid for the upgrades and what she discovered was — in addition to having Neanderthal DNA — that she has an identical twin named "BB."

"That has to be a joke, right?" she said in her Instagram video.

So Teigen said, as any of us would, that she started to spiral — she wrote to the supposed twin's profile, grilled a 23andMe robot assistant, texted her doctor, and called her father Ron Teigen Sr. to see if anyone knew what was going on.

"I call my dad and I literally say, 'Dad, hey, did you see me come out of mom's vagina and were there two of me?'" Chrissy recalled before he confirmed that it was just her.

It even got to the point where Teigen began to believe that this supposed twin could be why she was "co-dependent" and had issues with addiction.

But finally, Teigen said she called her sister to try to explain the mystery, who pointed out that the entire family had taken DNA tests under pseudonyms for the TV show "Finding Your Roots," a PBS series hosted by Henry Louis Gates Jr.

Their program never finished shooting, according to Teigen, and never aired, so she had completely forgotten about it.

"My identical twin was myself," Teigen concluded. "I was matching myself."

Teigen's Instagram was flooded with fans and celebrities all reacting to her story, from director Taika Waititi to her husband John Legend, who wrote "RIP Sissy Teigen."

Some even suggested this should be a scripted show that follows one woman's quest to find her twin before discovering it was herself all along.

Teigen isn't the only A-lister who took DNA tests for the PBS show "Finding Your Roots" — Julia Roberts, Viola Davis, Andy Samberg, and many others have all appeared, and in 2015, Ben Affleck controversially suppressed a slave-owning ancestor on the show. He later apologized.