Pauline Chalamet has given birth to her first child.

The 'Sex Lives of College Girls' star, whose brother is 'Call Me By Your Name' actor Timothee Chalamet, 28, gave birth three weeks ago.

In a video captured by French publication Paris Match, Pauline can be seen telling director Greta Gerwig at Stella McCartney's Paris Fashion Week show: "I just had a baby."

A shocked Greta - who has worked with Timothee on multiple movies, including 'Little Women' and 'Lady Bird' - replied: "No!"

Pauline said: "Yeah," and Greta replied: "Oh my god!"

The actress then put her arm around a man standing next to her, who she hasn't publicly revealed the identity of, and said to Greta: "We just had a baby. Three weeks ago."

In June, it was revealed Pauline was pregnant as she showed off her baby bump at the last Paris Fashion Week.

While Pauline doesn't disclose much of her personal life in the public eye, she has spoken about her brother before, previously admitting he watched her raunchy TV show with one of their parents.

Speaking to E! News in November 2022, she said: "My brother loves it ['Sex Lives of College Girls']. You'll have to get the story from him, because I believe he did watch it with one of my parents. So that is that.

"No, I don't watch this with my parents. Are you kidding?"

But the 32-year-old star is happy the show has been a hit.

She said: "That's when you're like whoa, I'm on something that people watch."