Nicole Richie Celebrates Birth of Sister Sofia's Baby Daughter Eloise with Funny Instagram Comment

Sofia welcomed her first baby with husband Elliot Grainge earlier this week

<p>Gilbert Flores/Variety via Getty </p> Nicole Richie and Sofia Richie.

Gilbert Flores/Variety via Getty

Nicole Richie and Sofia Richie.

Nicole Richie is one excited aunt!

After the star's sister Sofia Richie revealed that she welcomed her first baby with husband Elliot Grainge on Friday, May 24, The Simple Life alum celebrated the moment with a comment on the social media post announcing her niece's arrival.

"I now have a new favorite EG. sorry Elliot," Nicole, 42, wrote, referencing newborn Eloise Grainge's initials, which are the same as those of Sofia's husband.

Nicole's husband, Joel Madden, also celebrated Eloise with his own comment, writing, "❤️❤️❤️The ⭐️ of the family❤️❤️❤️."

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<p>Getty;</p> Sofia Richie and Elliot Grange.


Sofia Richie and Elliot Grange.

Related: Sofia Richie Welcomes First Baby, a Girl, with Husband Elliot Grainge: 'Best Day of My Life'

Sofia, 25, announced Eloise's arrival with a post shared on Instagram.

"Eloise Samantha Grainge 🤍5•20•24 best day of my life🤍," the model wrote alongside a black-and-white photo of her little one's feet cuddled into a pair of hands.

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Sofia confirmed she was pregnant with her first baby in an interview with Vogue earlier this year.

While chatting with the outlet, she said of her baby, "She’s growing pretty fast, so [the due date] is a bit up in the air."

<p>Theo Wargo/Getty</p> Sofia Richie.

Theo Wargo/Getty

Sofia Richie.

Related: Nicole Richie Says Her Kids with Joel Madden 'Grew Up on a Tour Bus': ‘We Turned Bunks into Cribs’ (Exclusive)

In a recent interview with Extra, Nicole said that she was “so excited” for her sister to become a mom.

Then, speaking with PEOPLE recently, the actress recalled her own experiences raising kids and how she brought them on tour with husband Madden, 45, while we was traveling across the globe with Good Charlotte. (The pair are parents to daughter Harlow, 16, and son Sparrow, 14.)

“When my kids were born, my husband was on tour, so they grew up on a tour bus,” Nicole said. “I was setting up a pack-and-play on the floor of the tour bus."

She added, "We turned one of the bunks into cribs, and that’s how they spent a good portion of their childhood, which I think is fun.” 

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