Blake Lively Steps Out with Older Sister (and "Teen Witch" Star) Robyn!
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Good genes run in the Lively family!

Blake Lively was snapped on the streets of New York City over the weekend, spending some quality time with her half sister, Robyn Lively.

The "Gossip Girl" alum, who's in the Big Apple shooting the upcoming Woody Allen film, looked picture-perfect in a Peuterey fur jacket, which she paired with dark denim, lace-up booties and tousled waves. Her 43-year-old sis looked cute and casual in jeans, tans boots and a two-toned gray sweater.

Don't these two look like they just stepped out of a hair commercial?!

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With that fiery red hair, Robyn actually doesn't look too much different than she did in her "Teen Witch" days back in 1989.

The actress, who played Louise Miller in the '80s cult classic, recently opened up about her most memorable role ... and her sex scene with Dan Gauthier.

"That was an added scene because they wanted to make it a bit sexier," she told BuzzFeed last year. "If I had the chance to do one thing over, I would take that [scene] out. I really would. It’s awful. Also, it implies that something happened with Brad and Louise that I wasn’t aware of at the time."

"I mean, the clothes on the stairs, the bed — I didn’t know," she added. "What’s funny is my mom was super upset because she wasn’t invited on set that day. She would have thrown a fit. But Robyn was enjoying every second of it. Man, he was cute."

We can't argue with that!