“Celebrity Lookalikes: 40+ Doppelgangers That Will Leave You Astonished”

Fisher and Adams, both red-haired actresses, look so much alike that people often mix them up. During an appearance on Jimmy Kimmel Live, Fisher made a funny PSA to remind viewers that she is not Amy Adams.

She jokingly said, "We have completely different names, so we're definitely not the same person."

Both actresses appeared together on the '90s cult classic show "Party of Five." However, at that time, Chabert was a child, so the similarities between them weren't as noticeable.

As time passed, their similarities became more and more obvious. In 2006, Chabert had a guest role on Hewitt's show, "The Ghost Whisperer," and viewers couldn't help but notice how much they looked alike.

Portman and Knightley started their acting careers as kids in the 1990s. In 1999, Knightley got a small part in "Star Wars: Episode I - The Phantom Menace" because she looked so much like the lead actress, Portman.

"I've been mistaken for Natalie Portman," Keira Knightley admitted during an interview on The Late Late Show. "I mean, I get confused with Natalie Portman quite a bit."

These two actors look so much alike that it's quite surprising, and they seem to be aware of it. When Ian Somerhalder appeared on The Kelly Clarkson Show, he shared a funny story about meeting Rob Lowe at a Golden Globes party:

"He walked up to my wife," Ian Somerhalder said, "She had never met him before. He held her face and said, 'This is what you're going to be looking at in 15 years'." And we have to agree, that's not a bad face to look at!

Australian actress Teresa Palmer started her Hollywood career with "The Grudge 2" in 2006, and fans quickly noticed that she looked a lot like the star of "Twilight."

"I've been mistaken for her on the street," Teresa Palmer said to MTV, "and I've just gone ahead and signed her name. I thought, 'You know what, whatever, I'll just sign her name,' because the person was so excited and I decided to just play along with it."