"I can't talk about it here 'cause I will literally start crying but I love him and he knows I love him," said Doherty. "It's Luke, and he's my Dylan."
Perry -- who currently stars on The CW's Riverdale -- famously played bad boy Dylan McKay on Beverly Hills, 90210. Doherty played Perry's love interest on the show, Brenda Walsh, before she left the series in 1994.
The 52-year-old actor was hospitalized on Wednesday after reportedly suffering a stroke. Perry was transported to a nearby hospital after police responded to a call at his home in Sherman Oaks, California.
"We received a 911 call at 9:39 a.m. yesterday," a spokesperson for the Los Angeles City Fire Department told ET on Thursday. "The firefighters and paramedics from our department responded and one ambulance transported to an area hospital."
A rep for Perry tells ET that the actor is under observation at the hospital.
Since news of his hospitalization first broke, many of Perry's past and present co-stars took to social media to share their prayers and well-wishes for the celebrated star. For more on the actor's hospitalization, watch the video below.