The photo appeared to be taken from her soap opera The Young and the Restless as costar Eric Braeden is seen in the background.
"#terrifying yes!" she captioned the wild snap. "I rocked a perm and I’m proud!"
Fellow Real Housewives Lisa Rinna, Lauri Peterson and Kelly Dodd agreed with her 80's sentiment.
Eileen dug a little deeper in June when she found a photo of her dressed up as a sexy cat for Halloween from when she was 18.
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The mother-of-one's Instagram primarily consists of her outings with husband Vincent Van Patten and their family.
The longtime couple enjoyed a sweaty day at Six Flags Hurricane Harbor back in July.
The longtime couple also enjoyed a spooky night at the Hollywood Forever Cemetery where they watched the classic horror film The Exorcist.
What are your thoughts on Eileen's crazy 80's TBT? Sound off in the comments!