Courteney Cox and Coco Arquette walk in The ALS Association Golden West Chapter Los Angeles County Walk To Defeat ALS at Exposition Park on October 16, 2016 in Los Angeles, California. Credit: Gabriel Olsen/FilmMagic

Who’s that girl?! Courteney Cox’s 12-year-old daughter, Coco Arquette, looked so grown up and hardly recognizable when she joined her famous mom at the ALS Association Golden West Chapter Los Angeles County Walk at Exposition Park in Los Angeles on Sunday, October 16.

At the event, Cox, 52, and Coco teamed up with a star-studded group of friends including Reese Witherspoon, Renee Zellweger and Jennifer Garner. They all came out to support publicist Nanci Ryder, who suffers from the incurable affliction, also known as Lou Gherig’s Disease.

Dressed in a red “Team Nanci” T-shirt and gray shorts teamed with just a touch of eye makeup, Coco — whose dad is Cox’s ex-husband, David Arquette — looked decidedly mature standing next to her mother.

During an appearance on the August 22 episode of NBC’s Running Wild With Bear Grylls, the Friends alum opened up about raising her only child with Arquette, 45, after she and the Never Been Kissed actor called it quits on their 14-year marriage in 2013.

"It wasn't a dramatic ending. I mean, as divorces go, I would say it's one of the better ones,” she said of the former couple’s split, adding that it didn’t take a toll on their well-adjusted pre-teen. “For sure. We're good coparents together.”

After her divorce, Cox went on to date Snow Patrol rocker Johnny McDaid and the pair got engaged in June 2014. Though they briefly parted ways in December 2015, Cox reconciled with her love this past spring.

When the duo walked the red carpet at this year’s BMI Music Awards in May, they stopped to give Us Weekly an update on their relationship. "Well, we love each other,” Cox gushed to Us at the time, “and we are — yes, we’re happy!"

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