90210 and Riverdale star Luke Perry suffered a massive stroke on Wednesday and is currently in the hospital under observation in L.A., TMZ reports. Sources close to the star tell the website that doctors have placed him in a medically induced coma.

Paramedics responded to an emergency call at his Sherman Oaks home around 9:40 a.m. He was reportedly responsive at the time, but his condition deteriorated on the way to the hospital.

The 52-year-old plays Archie’s dad Fred Andrews on Riverdale. Fox (officially) announced Wednesday that it is reviving 90210; his former costars Jennie Garth, Ian Ziering, Jason Priestly, Brian Austin Green, Tori Spelling and Gabrielle Carteris have signed on for the reboot. Perry has not.