The actor, who rose to fame playing Betty Cooper in the CW teen drama Riverdale alongside KJ Apa, Camila Mendes and Charles Melton, revealed her condition in a TikTok posted to Reinhart’s 6.1 million followers.
The TikTok includes the written caption: “Was just diagnosed with alopecia in the midst of a major depressive episode”. The clip included the actress lipsyncing to a voiceover of a man saying: “I am pushed beyond limits of what a person should be pushed to endure.”
The caption of the video reads: “Red light therapy is my new best friend.”
Alopecia is defined as “a disease that happens when the immune system attacks hair follicles and causes hair loss,” by the National Institute of Health.
The comments on the video, which has been viewed over 2.6 million times, have been flooded by support from Reinhart’s fans.
“The beginning is tough, but you got this,” one fan wrote.
Another added: “Welcome to the alopecia family! It’s not that bad but I get the frustration.”
Reinhart recently shared an exciting update on her new TV series, which co-stars Poor Things star Mark Ruffalo, announcing that Hal & Harper will be released “sometime in 2024”.
Writer, director and star Cooper Raiff previously shared that Hal & Harper is about a single dad whose troubles raising his two children leads to them literally growing up too quickly.
The series will costar Startup’s Addison Timlin and American Horror Stories star Havana Rose Liu.