Excuse Me, These Stars Are Related?!

They share the same last name but these two funny ladies also happen to be first cousins who grew up near one another in Illinois.

You might also like: Celebrity Children Who Look Just Like Their Famous Parents.

Wendt may be best known for playing Norm on Cheers but what people might not know is that he is Sudeikis' uncle. Both men grew up in the Midwest and both started their careers doing inprov — George in Second City in Chicago and Jason at Second City Las Vegas. (Pretend Rob Riggle isn't there; he's not related to either of them.)

You might also like: 30 Celebrity Kids More Famous Than Their Parents.

Kate may look more like her famous mom, Goldie Hawn, so it's easy to forget about her big brother. It's a shame they're both so unattractive.

You might also like: Celebrity Parents Who Have Twins or Triplets.

The actress happens to be the daughter of the journalist, though when they're side by side it's pretty obvious.

You might also like: 10 Celebrities Mastering Parenthood on Their Own.

Stellan has eight children, two with his current wife, and six from his first marriage. Four of his older kids are also actors but it's his eldest son, Alex, that you may know best, from his role on Big Little Lies or just from his overall hotness.

You might also like: 20 Kid's Products Celebrity Moms Totally Swear By.

The actress has made it clear that she has made a career for herself without her super-successful dad's help — but she's always had his support.

You might also like: 17 Celeb Moms Who Ate Their Placentas (and Swear by it!)

Musical talents run in this family. They both hit it big in their careers in the '90s and didn't use their relations — first cousins, to be exact — to their advantage.

The singing superstars are officially related ever since Clarkson married Brandon Blackstock, who just happens to be the son of McEntire's husband.

Obviously everyone knows Peyton and Eli are brothers from the famous football-playing family but did you know they are seconds cousins with the actress?

Allen's little brother Alfie has come a long way since Lily wrote a not-so-nice song about him in 2006. Now you may know him better as Game of Thrones' Theon Greyjoy, the heir to the Iron Islands. Really.

The Grown Ups actor and the "Ex's & Oh's" singer changed her last name because she wanted to find success on her own. Think she succeeded.

The actor and the late-night host don't just share the same colour hair; they're also third cousins.

The feminist and political activist became Bale's stepmom when she married his dad, David Bale, in 2000. They were married for three years before he died of a brain lymphoma at age 62 in 2003.

Bonnie's brother is Kit Culkin, Mac's dad. Not sure what's cooler — having her for an aunt or him as a nephew.

Gwyn's mother, Blythe Danner, is the half-sister of Katherine's dad.

Marty McFly's mom is also mom to the up-and-coming actress. Seeing them side by side, how did we not realize this earlier?

They share the same name, the same dad, and crazy-good acting abilities.

The actor-comedian and fashion designer have been in-laws even since she married his brother Andy in 1994.

What's more surprising — that the rocker and Today weatherman are second cousins, or that their resemblance is kind of uncanny?