Sometimes the apple really doesn't fall that far from the family tree.
 
Take, for instance, Blake Lively and her sister Robyn Lively, who have a lot more in common aside from being family. In fact, not only are they both actresses but they've taken great pride in being each other's best friends, with the pair sharing sweet glimpses into their bond over the years.
 
Most recently, when the Gossip Girl alum celebrated turning 35 last August, the Teen Witch star had more than enough xoxo's to share on the special occasion.
 
"Awww you're my best friend …." Robyn, 51, wrote in an August 2022 Instagram post featuring a montage of the pair together. "Now everyone knows you're barely younger than me. Happy Birthday sweet sissy, you're kinda special to me."
 
As for Blake, she's also praised the Saving Grace star as being "another element" of herself.
 
"She reflects in the things in me that I want to be more like," she told Access Hollywood in 2017. "I can sort of model after her the version that it is I want to be."

But Blake and Robyn aren't the only Lively family members in the entertainment industry, of course, as their mom Elaine Lively is also an actress and talent manager.
 
Not to mention, dad Ernie Lively was an actor known for his appearances in The X-Files, That's 70s' Show, The West Wing and The Sisterhood of the Traveling Pants, in which—you guessed it—he played Blake's onscreen father.
 
And the talent doesn't stop there: Their siblings Lori, Jason and Eric are all actors as well, with the latter known for his role as Carey Bell in Disney Channel's So Weird.
 
But the Lively family tree may not be the only one you'll be surprised to learn about. Keep reading for even more celebs you probably didn't realize are related.

The Mask of Zorro star was married to the Fifty Shades of Grey actress' mother Melanie Griffith for 20 years before they ultimately split in 2015, but that doesn't mean the stepfather and daughter's bond has been severed.

Johnson got emotional when she presented an award to Banderas at the 2019 Hollywood Film Awards.

"I come from a family of many a marriage and I got very lucky," Johnson, whose dad is actor Don Johnson, said. "I got a bonus dad who I realized that, over time, is actually one of the most influential people in my whole life," she said. "When I was six years old, my mother married a man who brought an unbelievably bright light and a whole new world of creativity and culture—and one remarkably magical little sister into our family."

The Teen Witch star and the Gossip Girl alum are half-sisters who share the same mom, talent manager Elaine Lively.

The "Ex's & Oh's" singer is the SNL vet's daughter, born from his relationship with former model London King.

The rapper and Fast & Furious franchise star is cousins with the R&B singer thanks to her stepfather, Reverend Edward Best, who happens to be Luda's uncle.

The late-night host and the Rescue Me creator are third cousins.

The onetime Grey's Anatomy doc has called the legendary director stepdad ever since he married her mom Kate Capshaw in 1991.

The Grown-ish star calls the rapper her second cousin. She was even the flower girl in his 2005 wedding with now ex-wife Kelis!

The star of The Politician is also the daughter of the Back to the Future icon.

Not only did the Veep vet make a name for herself playing a famous daughter on the HBO comedy, but she's also a famous daughter in real life. The erstwhile Jack Bauer star is her father.

Some Emily in Paris viewers were très shocked to discover Lily is the daughter of the English Grammy winner. 

The comedian and the New York Senator are actually related, as he's the first cousin of her father.

According to a 2014 People interview, a family historian from Ancestry.com claimed that the Fannings and the Duchess of Cambridge are all descendants of King Edward III, who ruled England from 1327 to 1377, making them very distant relatives—21st cousins, to be exact.

The actors are actually brother and sister!

The SNL alum calls the Cheers icon Uncle George whenever he seems him. At least, we assume he does.

Yep, Game of Thrones' Stannis Baratheon is the real-life dad of Fear the Walking Dead's Nick Clark.

The brunette beauty and the soulful "Stay With Me" crooner are third cousins. During a radio interview, Smith admitted that the pair have never met because their family is "huge."

The Salt actor and the memorable Law & Order: SVU guest star are half-brothers.

You may not have guessed but the Bridesmaids comedian and The View co-host are cousins.

The gorgeous British model is the eldest child of the Bush lead singer. The father and daugher first met when Lowe was 14 after she requested a paternity test. 

The We're the Millers actress has the perfect mentor in the Pretty Woman star, who happens to be her auntie.

Who knew the stunning Dancing With the Stars pro is second cousins with the Friends star?

The sexy True Blood vampire caught the acting bug from his dear old dad who stars in both The Avengers and Thor franchises.

The Ghost Rider actor comes from an extremely talented family. One of his cousins directed The Bling Ring, the other starred in Saving Mr. Banks and his uncle directed The Godfather.

The outspoken British singer is the older sister of the Game of Thrones star. She even wrote a song about him titled "Alfie."

 

The Damages star and the Lipstick Jungle actress are second cousins.

The Secret Life of Walter Mitty actress originally inspired her baby brother to get into show business.

The gorgeous Parks and Recreation actress is the daughter of the legendary music producer.

The Lost actor has a very famous cousin in the Mission: Impossible action star.

The "Drop It Like It's Hot" rapper is first cousins with The Game actress and her brother, Ray J.

The Anger Management star is the youngest brother of The Breakfast Club actor.