Beverly Hills, 90210
Jennie Garth and Tori Spelling were among those who mourned their former co-star.
The US star disclosed she'd been diagnosed with stage four cancer in 2020.
Beverly Hills, 90210 star Luke Perry and Grown Ups actor Cameron Boyce were among those not honoured.
The actors previously appeared in the 90s teen drama Beverly Hills, 90210.
"He was my teammate, my teacher, my sounding board, my compass, my brother."
“I will miss him everyday. Every minute. Every second.”
"No words can express what my heart feels hearing today's shocking news."
Luke currently plays Fred Andrews in the hit teen show Riverdale.