'Stranger Things' stars Millie Bobby Brown and Noah Schnapp promise to get married if they're still single at 40

There are many celebrity beauty lines coming out this year, one of which is Florence by Mills, a line from the star of the show, Millie Bobby Brown. It's hard to know what's worth the hype and what's not. The producer tried out two of the most popular products from the line to see if they were worth it.

• If they are still single at 40, they will marry.

• In an MTV News video, the stars of "Stranger Things" said that they only had one deal-breaker.

• The teens talked about their friendship and the hit show.

If they both agreed to not have children, they would have a marriage agreement.

In a video that MTV News shared on Thursday, the pair talked about their friendship and the latest season of their show. Brown said in the opening of the video that she and Schnapp would be good roomies. The relationship would be platonic, she said.

Brown said he couldn't deal with a child of yours.

Brown said that children would be a deal-breaker for him as well. You're so disorganized.

They play Eleven and Will in the sci-fi drama. The first season of "Stranger Things" was filmed in 2015. Brown said in the video that she's known Schnapp since she was 10 years old.

When Brown asked how their off-set friendship helps their on-screen chemistry, Schnapp said it was because he was with his friends.

It was fun to have the support of both of us when we were doing well. I loved it.

It's difficult for a young woman working in entertainment when she is surrounded by male energy. She said that Schnapp has always made her feel comfortable and confident.

The first part of the fourth season of "Stranger Things" aired last month.

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