Hollywood pays tribute to 'great friend' Valerie Harper

Former cast members -- such as her "Mary Tyler Moore" costar Ed Asner, who described Harper as "a wonderful actress" and "a great friend " -- shared their memories on social media.

They were joined by friends and fans, some of whom also wrote of her work as a feminist activist or other endeavors.

"A beautiful woman, a wonderful actress, a great friend and with balls bigger than mine. Her brilliance burst through and shined its light upon all of us. Goodnight beautiful. I'll see you soon." -- via Twitter

Topher Grace

"I was so sad to hear that the amazing Valerie Harper passed away. 'Aunt Paula' was as wonderful to work with as she was funny. My best to her family." - via Twitter

Tom Bergeron

"She lit up the ballroom." -- via Twitter

Cyndi Lauper

"Valerie Harper passed away. She was a wonderful actress and brought me so much joy. She will be missed rip." -- via Twitter

Mia Farrow

"Thank you brilliant Valerie- you gave us so much!! RIP Valerie Harper." -- via Twitter

Phil Rosenthal

"One of our all-time favorites has passed. Wonderful, funny, lovely, supportive and a huge influence on and off stage, we love you, Valerie." -- via Twitter

Marlee Matlin

"Even when she was down she danced and showed the world that she refused to let cancer beat her. Now Rhoda is with Mary in heaven. RIP Valerie Harper. You were the epitome of strength and humor." - via Twitter

Leonard Maltin

"Certain people become a part of our lives—and a part of our families. #ValerieHarper was one of those precious few. She was part of an ensemble but always had a comedic spark all her own. We were lucky to have her." - via Twitter

Julie Cohen

"Rhoda Morgenstern -- ambitious career woman, funny & artsy Jewish New Yorker, Mary's BFF -- was so relatable to me that I wore a scarf like hers all thru 7th grade. RIP Valerie Harper." -- via Twitter