Courteney Cox and David Arquette's daughter Coco is all grown-up -- See the pics!

Courteney Cox and David Arquette's 12-year-old daughter, Coco, has grown up before our very eyes.

Coco accompanied her famous mama and the actress' friends to the star-studded ALS Association Golden West Chapter Los Angeles County Walk at Exposition Park in Los Angeles on Sunday, where she looked adorable wearing matching "Team Nanci" red tee-shirts with the A-list squad. Cox, as well as Reese Witherspoon, Jennifer Garner, and Renee Zellweger, all came out to support their mutual friend and famed power publicist Nanci Ryder, who suffers from the incurable disease.

PICS: Celebrity Mother/Daughter Doppelgangers

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Coco went on the walk aside Courteney and Reese -- who has her own 17-year-old lookalike daughter, Ava -- looking like a typical pre-teen playing with her phone.

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This isn't Coco's first time in the public eye. In July, she starred in a music video for Irish singer-songwriter Foy Vance's "Coco." Foy met Courteney through the actress' boyfriend, Snow Patrol rocker Johnny McDaid.

Courteney Cox and CoCo
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Courteney Cox and CoCo
HOLLYWOOD, CA - APRIL 20: Director Courteney Cox and daughter Coco Arquette attend a screening of Anchor Bay Entertainment's film 'Just Before I Go' at ArcLight Hollywood on April 20, 2015 in Hollywood, California. (Photo by Michael Tullberg/Getty Images)
HOLLYWOOD, CA - APRIL 20: Actress/director Courteney Cox and Coco Riley Arquette arrives at the 'Just Before I Go' - Los Angeles Special Screening at ArcLight Hollywood on April 20, 2015 in Hollywood, California. (Photo by Steve Granitz/WireImage)
LOS ANGELES, CA - FEBRUARY 14: Courteney Cox, Johnny McDaid, and daughter Coco Arquette are seen at LAX airport on February 14, 2014 in Los Angeles, California. (Photo by GVK/Bauer-Griffin/GC Images)
Coco Arquette, Courteney Cox Arquette and David Arquette in Los Angeles, California (Photo by Jeff Vespa/WireImage via Getty)
Courteney Cox and Daughter Coco Riley Arquette pose backstage at 'Hairspray' on Broadway at the Neil Simon Theatre on September 6, 2008 in New York City. (Photo by Bruce Glikas/FilmMagic)
Courteney Cox-Arquette comforts daughter Coco at the Four Seasons in Beverly Hills after the toddler burst out crying. The youngster started bawling while the pair waited for their car outside the posh hotel but the Dirt star soon had Coco smiling again with a few words and a hug. (Photo: Richard Beetham, Splash News)

Courteney Cox Arquette carries daughter Coco to the car after having lunch at Ed's Coffee Shop along Robertson Boulevard in West Hollywood, Ca. (Photo: London Entertainment/Splash News)


WATCH: Courteney Cox Opens Up About 'Brutal' Breakup With Johnny McDaid and Criticism About Her Appearance

Last April, Courteney gushed about her only daughter during her appearance on The Ellen DeGeneres Show, when she revealed Coco sang at her dad David's wedding to former ET correspondent, Christina McLarty.

"She's a really good singer," Courteney said. "I don't know where she got it."

Watch below:

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