Chris & Scott Evans
Sure, we all know who Captain America is, but it turns out his younger brother is an actor too! Scott Evans was a regular on One Life to Live, and had a recurring role on White Collar.
Britney & Jamie Lynn Spears
"Gimme More" of the Spears sisters! The popstar's little sister is probably best known for her part on Zoey 101, but she also has a career in country music!
Joe & Nick Jonas
We will never stop swooning over the Jonas Brothers. Ever. While the third JoBro has opted for the quiet life, the "Chains" singer and DNCE frontman have stayed in the limelight.
Serena & Venus Williams
The tennis superstars are more than just the perfect doubles-partners - they're sisters too!
Liam, Chris & Luke Hemsworth
In case you missed it, there's another Hemsworth hunk to look out for: while everyone knows Thor and Gale from The Hunger Games, you can catch their oldest brother, Luke, in Westworld!
Miley & Noah Cyrus
We can't stop, and we won't stop! Besides their rockabilly dad, Billy Ray, alt rocker brother, Trace Cyrus, and of course the "Wrecking Ball" singer herself, Miley's little sis has a music career of her own!
Benji & Joel Madden
Family that plays together, stays together. The Good Charlotte brothers are a couple of siblings that rock!
Amal Clooney & Tala Alamuddin
Clearly, these two share more than just good genes—they both have impeccable fashion sense!
Willow & Jaden Smith
Would you expect any less from the children of Will and Jada Pinkett Smith? The Smith kids are both multi-talented rappers, actors, and models.
Beyoncé & Solange Knowles
The Knowles sisters truly "Run the World" - Queen Bey and her little sis are both Grammy-award winning performers.
Nikki & Brie Bella
WWE Divas "The Bella Twins" have taken the nation by storm with their captivating E! reality series Total Divas.
Demi Lovato & Madison De La Garza
The Sonny with a Chance actress' younger half sister is also an actress, known best for her role on Desperate Housewives.
James & Dave Franco
Blockbuster brothers? The oldest Franco is know for his part in films like Pineapple Express, in addition to producing and directing; his youngest brother (yes, there's another!), starred in the Now You See Me franchise.
Nicole & Sofia Richie
The daughters of music legend Lionel Richie have gone on to successful careers in fashion, Nicole launching her House of Harlow fashion line while Sofia walks the runway.
Kate & Pippa Middleton
While Kate became royalty when she married Prince William, it was her younger sister and bridesmaid who unexpectedly burst onto the international spotlight in her scene-stealing Alexander McQueen gown.
Gigi & Bella Hadid
The Hadid sisters have taken over the fashion industry, walking runways worldwide.
Ashley, Elizabeth & Mary-Kate Olsen
While they're killing the game at Fashion Week, we can't help but miss the twins from Full House. No worries though - their younger sis, Elizabeth, is an actress too!
Kevin & Matt Dillon
The Outsiders actor is no stranger to fame, and neither is his younger brother Kevin, who has starred in Entourage, Platoon, and a biopic for The Doors.
Kate & Rooney Mara
From the box office smash Fantastic Four to the critically acclaimed Carol, the Mara sisters are Hollywood powerhouses.
Dakota & Elle Fanning
Clearly, acting is in their blood - both The Runaways star and her younger sister, the Maleficent actress, have already had incredible acting careers.
Kendall & Kylie Jenner, Kim, Kourtney & Khloé Kardashian
What would Keeping Up With the Kardashians be without these crazy, loving, super stylish sisters? The fights, the makeups, the meltdowns—the Kardashian-Jenner never disappoint.
Haylie & Hilary Duff
It feels like it was "So Yesterday" that these two multi-talented stars appeared alongside each other on Disney Channel.
Mark & Donnie Wahlberg
From their Marky Mark and New Kids on the Block days to Planet of the Apes and Blue Bloods, these singing, rapping and acting brothers have taken very similar paths to fame and success.
Charlie Sheen & Emilio Estevez
The acting gene was definitely passed down to these brothers from their dad, Martin Sheen. The bros appeared opposite each other in 1989's Young Guns. Lucky guys probably didn't have to work on gaining any onscreen chemistry.