Kelley Mack, October 2021. Credit :

Barry Brecheisen/Getty

• Kelley Mack, born Kelley Klebenow, died on Aug. 2 after being diagnosed with glioma of the central nervous system
• She appeared as “Addy” in season 9 of The Walking Dead
• According to her obituary, the 33-year-old “passed away peacefully” with her family near

Kelley Mack, an actress known for appearing on The Walking Dead, has died. 

The Cincinnati, Ohio native, born Kelley Klebenow, died on Aug. 2, after being diagnosed with glioma of the central nervous system, her Tuesday, Aug. 5, obituary said. She was 33. 

Her loved ones also confirmed her death directly through her own social media on Tuesday, Aug. 5.

“It is with indelible sadness that we are announcing the passing of our dear Kelley. Such a bright, fervent light has transitioned to the beyond, where we all eventually must go,” read a post shared on Mack’s Instagram account. 

A single photo of the actress accompanied the post. 

Both the Instagram post and her obituary stated that Mack “passed [away] peacefully,” surrounded by family.

Mack, who has 35 credits as an actress and five as a producer, starred as “Addy” in season 9 of The Walking Dead. The series ran for 11 seasons, beginning in 2010 until its final episode in 2022. 

Kelley Mack, Chicago International Film Festival at the AMC River East Theater on October 14, 2021. Barry Brecheisen/Getty

Additionally, she was cast as “Penelope Jacobs” in season 8 of Chicago Med and on FOX’s 9-1-1. She also held roles in movies like “Alice” in Broadcast Signal Intrusion and “Wilda” in the recently released Delicate Arch.

She also did commercial work with Dr. Pepper, Ross stores, Dairy Queen and Chick-fil-a. Mack is currently featured in a Rakuten commercial with her mom, Kristen.

Another way she showcased her talent was by doing voice-over work, and previously recorded for the Oscar-winning Spider-Man: Into the Spider-Verse as the voice match for Hailee Steinfeld’s character, Gwen Stacy.

Mack graduated from Hinsdale Central High School in 2010 and, in 2014, she earned a bachelor’s degree in cinematography from Dodge College of Film at Chapman University in Orange, Calif. 

Her love for storytelling was inspired by a video camera that she received as a birthday gift as a child. She began acting in commercials not long after.

Kelley Mack, ‘Broadcast Signal Intrusion’ premiere at iPic Theaters on October 19, 2021. Amanda Edwards/Getty

Following her academic career, she lived and worked in the Los Angeles area for the past 11 years.

Though Mack won several awards for her work throughout her lifetime, she was known for “her warmth, creativity, and unwavering support for those around her.”

Never miss a story — sign up for PEOPLE’s free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer​​, from celebrity news to compelling human interest stories.

“​​She cherished time with her family and friends, finding joy in collaboration and storytelling,” her obituary said, adding that Mack also loved hiking, pickleball, biking, playing piano and traveling.

The actress will posthumously appear as “Ricky” in the to-be-released Universal.

Mack is survived by her parents, Kristen and Lindsay Klebenow; two younger siblings — sister Kathryn; brother Parker, also an actor; grandparents Lois and Larry; and her “dearest boyfriend,” Logan.