You’ve probably seen the photos. Two blonde, tall, and strikingly similar women laughing on a red carpet, or maybe a heartfelt Instagram post where they look more like twins than just relatives. It makes you wonder: does Blake Lively have a sister, or is she just hanging out with a very glamorous doppelgänger?
Honestly, the answer is a lot more interesting than a simple "yes." Blake isn't just one of two; she’s the youngest of a massive, super-talented entertainment dynasty. While she might be the one currently dominating the box office and the Met Gala steps, her sisters were actually paving the way in Hollywood years before Gossip Girl was even a glimmer in a producer's eye.
Blake has two sisters—Robyn Lively and Lori Lively. Technically, they are her half-sisters, but if you ask the family, they’ll tell you that "half" isn't a word they use. They’re just sisters. Period.
The Sister Most People Recognize: Robyn Lively
If you grew up in the 80s or 90s, you didn't know Robyn as "Blake Lively’s sister." You knew her as Louise Miller from the cult classic Teen Witch. Robyn is 15 years older than Blake, and she was a massive star while Blake was still in diapers.
She’s the one you see most often by Blake’s side. They have this incredibly tight bond that seems to defy the usual Hollywood sibling rivalry tropes. Robyn has famously said that their age gap basically disappeared the moment Blake became a mom. Now, they’re just two best friends navigating the chaos of parenthood together.
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Why Robyn is a Legend in Her Own Right
- Teen Witch (1989): This is the role that cemented her status. If you haven't seen the "Top That" rap battle, you haven't lived.
- The Karate Kid Part III: She played Jessica Andrews, a role she recently reprised in the Netflix hit Cobra Kai.
- Twin Peaks: She had a memorable run as Lana Budding Milford.
- The Wedding Connection: She’s married to Bart Johnson, who played Coach Bolton in High School Musical. Yeah, the Lively family tree is basically a "Who's Who" of millennial nostalgia.
The two of them share a sense of humor that is, frankly, a bit much for some people to handle. They’re constantly trolling each other on social media, stealing each other's clothes, and showing up to support one another's projects. When Blake’s film It Ends With Us premiered, Robyn was right there, posting about how she watched her sister "pour her heart and soul" into the role.
The "Fixer" of the Family: Lori Lively
Then there’s Lori. She’s the oldest of the bunch, 21 years older than Blake. While she’s done her fair share of acting—appearing in things like Star Trek: Deep Space Nine and Two and a Half Men—she’s found her true calling behind the scenes.
Lori is what people in the industry call a "fixer" or a top-tier acting coach. She’s worked with some of the biggest young names in the business, including Millie Bobby Brown and Victoria Justice. Imagine being so good at your craft that you're the one the Disney Channel calls when they need to prep their next big star. That’s Lori.
She’s less of a public figure than Blake or Robyn, but she’s just as much a part of the inner circle. She even made a cameo alongside her sisters and their father, the late Ernie Lively, in the 2006 horror flick Simon Says. It was a total family affair.
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It’s a Full House: Don’t Forget the Brothers
To really answer the question of who Blake Lively's siblings are, you have to look at the guys, too. It’s not just a girls' club.
Eric Lively is Blake’s only full sibling. He’s the one who actually forced her to start acting. Blake was a total overachiever in high school—class president, cheerleader, the whole bit—and had zero interest in being an actress. Eric literally took her on a tour of Europe and, in between sightseeing, forced her to go to auditions. Without him, we might never have had Serena van der Woodsen. You might recognize him from The L Word or the cult horror film The Butterfly Effect 2.
Then there’s Jason Lively. He’s the oldest brother and played the iconic role of Rusty Griswold in National Lampoon's European Vacation. He’s mostly stepped away from the spotlight now, reportedly working in the tech industry and once owning a mobile roasted corn business called Jimmy Crack Corn.
Why the "Half-Sister" Label Doesn’t Fit
The Lively family dynamic is a bit of a lesson in how to do a blended family right. Blake’s mother, Elaine Lively, had Lori, Jason, and Robyn with her first husband. When she married Ernie Lively (born Ernest Brown), he adopted the three kids. He even took the "Lively" name so the whole family would have the same surname.
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That’s why you’ll rarely hear any of them mention being "half" siblings. They grew up in the same house, under the same name, with the same goal: making it in show business.
The Secret to Their Bond
It probably helps that their parents were acting coaches. Instead of going to soccer practice, the Lively kids were often sitting in on acting classes. Blake has talked about how she used to go to her parents' classes just because they couldn't afford a babysitter. She was learning the craft through osmosis before she could even read a script.
This shared history created a foundation that’s rare in Hollywood. There’s no jealousy here. When one sister succeeds, they all treat it like a win for the team.
Actionable Takeaways from the Lively Family Dynamic
The way the Lively sisters handle their relationship offers some pretty solid life lessons, whether you're a celebrity or not.
- Redefine "Family": The Livelys prove that biology isn't the only thing that makes a sibling. By dropping the "half" labels early on, they built a unified front that has lasted decades.
- Support as a Strategy: In an industry known for tearing people down, the Lively sisters are each other's loudest cheerleaders. This isn't just nice; it’s a career strategy. Having a safe space within your family allows you to take bigger risks professionally.
- Find Common Ground: Robyn and Blake found their "deeper level" through motherhood. Even with a 15-year age gap, finding a shared life stage can bridge almost any distance.
- Know Your Role: Not everyone needs to be the A-list movie star. Lori’s success as a coach and Eric’s move into photography show that you can be part of a "famous" family while finding your own specific niche.
If you’re looking to dive deeper into the family's filmography, start with Teen Witch for a hit of nostalgia, then check out Simon Says to see the whole clan on screen together. It's a rare glimpse into a family that actually enjoys working—and living—together.