Shannen Doherty's former co-stars Alyssa Milano, Tori Spelling, Jennie Garth, lead tributes after her death at 53

Beverly Hills, 90210's Jason Priestley shared a throwback of the pair together from the show and wrote: "Shocked and saddened to hear about the passing of my friend Shannen." 

"She was a force of nature and I will miss her. Sending love and light to her family in this dark time."

Charmed co-star Alyssa Milano, who famously had a more tense relationship with Shannen, put that aside for a touching remembrance for her former colleague that acknowledged their up and down relationship, shared with Entertainment Weekly.

READ: Shannen Doherty and Alyssa Milano's feud on Charmed — a timeline of their friendship and fallout

"It's no secret that Shannen and I had a complicated relationship, but at its core was someone I deeply respected and was in awe of. She was a talented actress, beloved by many, and the world is less without her. My condolences to all who loved her."

Charmed star Rose McGowan took to Instagram with a compilation of photos of the stars together, and penned: "Shannen Doherty had the heart of a lion. Passion for craft is often mislabeled as trouble. Shannen was passion. I met her in the 90s and was awed." 

"Getting to really know her later in life, a beautiful gift. This woman fought to live. Shannen knew how to be a star because she was one since childhood. Her work ethic inspiring to the end. Shannen's great love for directing, for acting, Holly, her friends, her parents, dog and her beloved fans was legendary. Our lives had been intertwined in a unique way." 

She continued: "We laughed at dark forces who wanted us to hate each other, instead we chose love and respect. A soft-hearted badass as there ever was. A force of energy that will live forever in hearts. May angels and God carry her to the holy kingdom where she is healthy, young and wild forever. Rest now warrior, we will never forget you dear sister."

Gabrielle Carteris, known for playing Andrea Zuckerman on Beverly Hills, 90210, shared a photo of the sky and also acknowledged the untimely passing of their co-star Luke Perry years prior.

READ: The Curse of Beverly Hills 90210

"So young – so sad. May you RIP Shannon. I know Luke is there with open arms to love you," she wrote.

Beverly Hills, 90210's Brian Austin Green took to his Instagram Stories with a tender message for the late actress, writing: "Shan. My sister…you loved me through everything."

MORE: All we know about Brian Austin Green and Sharna Burgess' blended family and five children

"You were a big part of my understanding of love. I'll miss you more than I know how to process right now. Thank you for the gift of you."

Carol Potter, who played Shannen's on-screen mom on 90210, penned on social media: "Shocked and saddened by news of Shannon Doherty's death. What a journey she has been on!" 

"Gone too soon. Throughout, she stayed true to herself and gave us an example of courage and perseverance in facing her own death. May she rest in peace."

Olivia Munn, who opened up about her own battle with breast cancer earlier this year, revealed that she had received the support of the actress during her illness. "I am absolutely heartbroken over the passing of Shannen Doherty. When I was first diagnosed with breast cancer I remembered how she bravely let the world into her journey and reached out to her." 

"We became instant friends – which I honestly couldn't comprehend at times because watching her on '90210' was everything to me when I was 10. We bonded through a shared battle and a desire to help other women. Looking back on the last text she sent me just a couple months ago, she asked how I was doing and if she could do anything for me...." 

READ: Olivia Munn recalls 'bawling' over results of 'scary' egg retrieval with John Mulaney: 'Just want one more baby'

"True to form, Shannen was offering her support even though she was in the final stage of fighting this horrific disease. Cancer is really [expletive] scary and Shannen faced it with such dignity, strength and grace. I'm sending all of my love to her mother who was her best friend, hero and champion every step of the way. Fly so high, my friend."

Beverly Hills, 90210's Tori Spelling, who recently reconnected with Shannen through their podcasts, posted a recent selfie of the pair on her Instagram Stories with a slew of broken-hearted emojis.

She wrote: "I don't have outward words yet...but WE knew and that's what matters."

Fellow 90210 co-star Jennie Garth shared a pair of throwbacks from their time on the show on Instagram and included a lengthy and emotional tribute. "I am still processing my tremendous grief over the loss of my long time friend Shannen, the woman I have often described as one of the strongest people I have ever known."

"Our connection was real and honest. We were so often pitted against each other but none of that reflected the truth of our real relationship which was one built on mutual respect and admiration."

READ: Shannen Doherty's one heartbreaking wish before tragic death revealed

She continued: "She was courageous, passionate, determined and very loving and generous. I will miss her and will always honor her deeply in my heart and in my memories. My heart breaks for her family and Bowie and all the people who loved her."

Longtime close friend Sarah Michelle Gellar shared many photos of theirs and used her tribute to honor her love for animals and encourage fans to support animal shelters and donate in her honor.

"How do you possibly find the right words to sum up 30 years of friendship? I keep reminding myself it only hurts this much because there was so much love. Thank you, for all your kind words and support. I love all the messages about how @theshando was important to you. So let's honor her." 

READ: Sarah Michelle Gellar calls longtime friend Shannen Doherty 'brave' during breast cancer battle

"More than anything, Shan loves animals, especially dogs. In her memory let's support our favorite animal charities. Whether that's donating money, stopping by your local shelter and just offering cuddles and walks to animals housed there or even just tagging them in the comments so other people can learn about their work." 

She concluded: "I know that would make our girl happy (and illicit that deep throaty laugh we all loved)."