It's Solange Knowles' 26th birthday!

We've loved watching Beyoncé's little sister step into her own over the years to become a solo musician, globe-trotting DJ, professional model and style star who has captured our fashion-loving hearts. And remember she's the mother to her adorable son, Julez, making her a certified superstar.

Speaking of superstars, it definitely helps that Solange's sister Beyoncé is the biggest of them all. The twosome still consider each other best friends and support each other in all that they do.

And they are not alone. Plenty of celebrity sisters have taken the world by storm: Serena and Venus, Elle and Dakota, Tia and Tamera -- just to name a few. Such dynamic duos!

Whether they take the divide-and-conquer route, like Beyonce and Solange, or the tag-team approach, like Mary Kate and Ashley Olsen, the sisters in the slideshow below have some seriously fabulous genes and awesome drive for success.

So, in celebration of Solange's 26th birthday, here's a look at some of Tinsel Town's most famous sisters.

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  • Beyonce and Solange Knowles

  • Mary Kate and Ashley Olsen

  • Venus and Serena Williams

  • Kourtney, Khloe and Kim Kardashian

  • Jessica and Ashlee Simpson

  • Sasha and Malia Obama

  • Vanessa And Angela Simmons

  • Catherine The Duchess of Cambridge And Pippa Middleton

  • Tia and Tamara Mowry

  • Elle and Dakota Fanning

  • Debbie Allen and Phylicia Rashad

  • Paris and Nicky Hilton

  • The Braxtons

    Traci Braxton, Tamar Braxton, Toni Braxton, Evelyn Braxton (mother), Trina Braxton and Towanda Braxton

  • Lindsay and Ali Lohan

  • Latoya and Janet Jackson

  • Penelope and Monica Cruz

  • Erica and Trecina 'Tina' Atkins-Campbell aka Mary Mary

  • Haylie and Hilary Duff