You likely already know about the Olsen twins and their younger sister Elizabeth, as well as Dave and James Franco or Luke and Owen Wilson. And you've already learned about all the celebrity pairs that are best friends, but there are quite a few famous faces that you probably didn't know were all in the same family.
Keep reading to see the 43 celebrities you probably never knew were related.
Amy Daire contributed to a previous version of this article.
SEE ALSO: The 13 most famous brother and sister duos in Hollywood
FOLLOW US: INSIDER Entertainment is on Facebook
Singers Ray J and Brandy are siblings, but they are also cousins to rapper Snoop Dogg.
Singers and siblings Brandy and Ray J have made their typical brother-sister relationship pretty public. Like most siblings, they post pictures of one another to their social media accounts, walk the red carpets together, and sometimes they even talk or argue over Twitter.
Meanwhile, the pair are also close with their cousin Snoop Dogg. Snoop has collaborated with Brandy and used her in a music video, and he had Ray J as a guest on his YouTube show where he introduced him as "my cousin, my family, my familia."
Singer Lily and "Game of Thrones" actor Alfie Allen are brother and sister.
Talent clearly runs in the family seeing as she's a famous singer and he's made waves as Theon Greyjoy on "Game of Thrones." Like most siblings, they seem to have a love-hate relationship.
The singer once wrote a song about her brother needing to get a job and several years later slammed "Game of Thrones" during a Reddit AMA saying that she was offered a incestuous cameo to play his sister on screen. Alfie then denied that fact.
"The only thing I'm going to say on that is that it's not true," he said to Vulture. "And also that Gemma Whalen was always their first choice for the part. And she's fantastic. And that's the one thing I’m going to say about that."
Since then he's "banned" her from discussing the show at all.
Jason Momoa is the stepfather of Zoë Kravitz.
Momoa has been with Kravitz's mother, Lisa Bonet, for 12 years. The happy couple got married in a quiet ceremony this October, making Momoa the official stepfather of Kravitz. The new family members have shared sweet Instagram photos of themselves together, including one where Kravitz called Momoa "papa bear."
Momoa and Bonet also have two other children together — Nakoa-Wolf Manakauapo Namakaeha Momoa and Lola Iolani Momoa.
See the rest of the story at INSIDER