Noah Schnapp Shares Throwback Pics with Twin Sister Chloe to Celebrate Their Birthday: 'Thank You for Being There'

The 'Stranger Things' star turned 19 on Tuesday

Noah Schnapp celebrated another year around the sun with his built-in best friend.

The actor turned 19 on Tuesday and marked the birthday with a sweet tribute to his twin sister, Chloe.

“Happy birthday to the best twin sister I could ever ask for,” Noah wrote on Instagram as he shared several throwback photos from their childhood. “Thank you for being there with me through it all and supporting me every day. Me and you for life chloe❤️”

Chloe, 19, commented on her brother’s post: “I LOVE U best friends for life❤️❤️🤞🤞🤞🤞”

She also shared her birthday wishes for Noah on Instagram and thanked him for “never leaving my side and being my person.”

“Happy birthday lay lays sending all my love❤️☺️,” she wrote in the caption.

Related: All About Noah Schnapp's Twin Sister, Chloe Schnapp

While her brother gained fame as an 11-year-old for his career-launching role in Stranger Things, Chloe has not pursued an acting career.

She is currently a student at Northeastern University in Boston, where she studies marketing. Noah attends the University of Pennsylvania.

Noah has kept his relationship with his twin largely private over the years — several followers even expressed shock that he’s a twin in the comments of his Instagram post. However, he was candid about the role Chloe played in his coming-out journey.

In an interview with Variety in August, he revealed that she was the first person he told that he was gay. “I can’t tell anyone else before I tell my own twin sister — she’ll kill me,” he said.

The actual act of coming out — even to his twin — proved daunting.

“I was driving, and I just kept putting it off. Our house was right down the road, and she was like, ‘Why do you keep making these wrong turns?’ I was like, ‘I can’t do it, I can’t do it.’ Then we got home, and I was like, ‘Screw it,’” he said.

Chloe’s reaction was more than supportive. Noah said she was “ecstatic” at the news.

“She said that she would’ve hated the idea of me marrying another girl and having to compete with that girl for my attention. The fact that now it’ll be a guy, she was like, ‘Oh, he’ll be my best friend.’”

Related: Noah Schnapp Celebrates 'First Pride' in New York City Nearly 6 Months After Coming Out

As for what pushed him to come out, the actor said it was a mix of his Stranger Things character’s influence and the beginning of his college experience.

Of realizing he was gay after starting school at Penn last year, he recalled, “All these new girls were starting to hit on me, and I was like, ‘I don’t like this. I don’t want this,’” he says. “I was like, ‘Holy s---. I know now.’”

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The release of season 4 of the Netflix series was another push for Noah to come out, as the sexuality of his character, Will Byers, was clear for the first time.

"Once I did fully embrace that Will was gay, it was just an exponential speed towards accepting it for myself," he told the outlet. "I would be in a completely different place if I didn’t have Will to portray, and to embrace and help me accept myself."

He added, "I think if I never played that character, I probably would still be closeted."

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