There's no denying the musical magic Eilish and her brother create together. Finneas co-wrote and produced his sister’s debut album Don’t Smile at Me.
"I say this all the time: I'm not sure what I would do if I was by myself going through this whole thing," Halle told Cosmopolitan about the sister duo’s music career.
This dynamic duo are two of the most influential TikTokers in the world — and fame has brought the sisters even closer, Charli told Girls’ Life.
Noah admitted that she "always believed" she would only stay in sister Miley's shadow. She even wrote about it on her EP The End of Everything.
Before the trio decided to get back together in 2019, they spent a year “working through some things” to be on the same page, Nick Jonas told James Corden.
"Now, if we're having a hard time at work, we can just walk to the other side of hair and make-up and see one another," Bella told The Telegraph.
The two spent a lot of time perfecting their skills even before Dancing with the Stars. “Now, when we dance together it's got a fun energy about it,” Derek told PEOPLE.
They played siblings (what a stretch) in 2001's Donnie Darko. "Jake and I are both each other's toughest critic," Maggie shared on the set of the movie.
Once Zooey joined her sister (who starred in Bones) at Fox with her own show New Girl, she’d go to her sister’s trailer for snacks, she told Collider.
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Maksim opened up to PopSugar about competing against his brother on Dancing with the Stars. "It's not competition when it's family," he said.
How could anyone forget their shared role as Michelle Tanner in Full House, straight-to-VHS movie empire or joint fashion house The Row?
Hollywood isn’t at a loss for famous twins. Art imitated life for the Sprouse brothers in the Disney show The Suite Life of Zack & Cody.