We've shared lists about celebrities with some tragic pasts before, but not all of the secrets about your favorite stars are upsetting.
You may be surprised to learn that some of Hollywood's most talented actors have equally impressive family members.
Sometimes the family resemblance is so close you'll kick yourself for not realizing this sooner, but in other cases it's downright impossible to spot.
See how many of these famous families you already knew about!
1. Kate Hudson's parents are Goldie Hawn and Kurt Russell
Let's start off with one Hollywood family some people already know about. The Bride Wars star is Hollywood royalty, with a movie star mom and step-father.
2. Jenny McArthy and Melissa McArthy are cousins
Talk about a funny family! These two comediennes even share throwback memories of the days before they were famous
3. Alexander Skarsgard has a famous father
If you loved True Blood you'll recognize this TV star, but remember his dad Stellan? He had roles in big films like The Avengers and Good Will Hunting.
4. Al Roker and Lenny Kravitz are distant cousins
These two are as close as you can get to total opposites, so it's surprising that they're actually related. The weatherman is connected to the rocker through their grandparents.
Click the next page to learn about some surprising celebrity siblings!
If you want to learn more Hollywood secrets, there are lots of secrets to uncover about child stars who died young. These are the tragic stories Hollywood would rather forget.
On a happier note, see what some of your favorite child stars used to look like and compare their looks now with these "then and now" photos.
But be sure to keep reading to learn the famous connections stars like Julia Roberts and Ben Affleck keep secret!
5. Warren Beatty and Shirley MacLaine are siblings
Warren says his sister's success in Hollywood inspired him to pursue his own movie career. I bet she teased him pretty bad after his Oscars flub!
6. Rob Schneider is Elle King's father
The "Exes and Ohs" singer says she wanted to be her "own person," hence the name change.
7. Jason Sudeikis is George Wendt's nephew
The SNL star shared some great advice from his famous uncle, who played Norm on Cheers, about succeeding in show business: "Get on one of the best sitcoms of all time and then ride it out!"
8. Prince Charles and Raph Fiennes are eighth cousins
The Harry Potter star has a royal connection hiding in his ancestry. Both these Brits were related to Scottish king James II, who ruled in the 1400s.
9. Rashida Jones is the daughter of music producer Quincy Jones
Jones produced some incredible records, including Michael Jackson's Billie Jean and We Are The World, but arguably his biggest success is his daughter - Parks and Recreation star Rashida Jones.
Click the next page to learn about Julia Roberts movie star brother!
To learn about more Hollywood families, see if you already knew about these 10 celebrities who are adoptive parents.
If you love the Golden Age of Hollywood, you might be surprised to learn that some of your favorite movie stars fought in World War 2.
Got an itch for some Hollywood scandals? How about the celebrity cold case that's been unsolved for decades.
But first, keep reading to learn which actress is related to Ron Howard!
10. Julia Roberts has a famous brother and niece
While she's undoubtedly the biggest star in the family, Julia's brother Eric has made his own mark in films like The Expendables. Now, his daughter Emma is stepping into the spotlight on TV shows like Scream Queens.
11. Matt Damon and Ben Affleck are distant cousins
These two movie stars are so close it's not surprising they had a secret connection. They're tenth cousins once removed, both connected to a bricklayer who came to America from England.
12. Patrick Wilson and Scott Foley are brothers-in-law
The star of The Conjuring has a pretty famous family, since his brother-in-law has a role on Scandal.
13. Bryce Dallas Howard is Ron Howard's daughter
Odds are you only recognize either the Twilight star or her famous dad, but they're both famous in their own right.
Share this post if you learned something new!