Lili Reinhart is mourning the death of her grandfather.
On Sunday, the Riverdale star, 24, shared on social media that her beloved grandfather died “a few days ago.”
“It breaks my heart that I can’t be with my family during this time, as we experience this loss. But I’m remembering him on my own, as a simple man from Ohio who loved his Cleveland sports teams and who fell asleep in front of the tv watching old western films,” Reinhart wrote.
“He was married to my grandma for 61 years and always called her ‘babe,’ which I thought was the sweetest thing,” she added. “I wish I could’ve seen him one last time but I’ll forever hold him in my heart. Love you, grandpa.”
Alongside her touching tribute, Reinhart included a black-and-white photo of her grandpa, smiling in a collared shirt.
Several of Reinhart’s friends and fans sent their condolences her way in the comments section of her post.
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 juicy celebrity news to compelling human interest stories.
“Sorry for your loss, friend. I’m here if you ever need to talk. You know how to find me. Xoxo. Bless you and your family. Light and prayers,” New York Times bestselling author Robert M. Drake wrote.
Her Riverdale costars Madelaine Petsch and Camila Mendes also showed their support for Reinhart. Petsch commented “love you” with a heart emoji while Mendes also added a heart emoji in her own comment.
Last year, Reinhart opened up to her fans about her journey with mental health and wanting to share her trials in a poetry book she wrote titled Swimming Lessons.
Speaking to PEOPLE about the project in September, she said she always feels compelled to tell others what she is going through.
“If I’m going through something — depression, anxiety, a breakup — I need to talk about it,” Reinhart told PEOPLE at the time. “I’ll talk to my friends for hours, I’ll write about it for pages and pages in my journal, I’ll write countless poems about it.”