As the world grieves the loss ofLuke Perry, his daughter Sophie is thanking her mother Minnie Sharp for holding the actor’s family together.

“You all know my dad is a super star, but I just want to share for a moment that I got really f—ing lucky in the parental department because this is my mom,” Sophie, 18, began in an Instagram post on Friday. “Minnie. Who also happens to be my best friend. Wow, how cliche, I know.”

Luke Perry and Rachel ‘Minnie’ Sharp.Tammie Arroyo/Getty

4/12/95 Westwood, CA. Luke Perry with his wife, Minnie Sharp at the premiere of “Beauty And The Beas

“And she is the rock for everybody grieving in this family right now. She’s the toughest and sweetest and most amazing woman I or anyone else has ever met,” she said captioned the photo of her and her mother, whose real name is Rachel Sharp.

Sophie Perry/Instagram; Inset: VALERY HACHE/AFP/Getty

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TheBeverly Hills, 90210actordiedMonday at age 52 aftersuffering a massive strokedays earlier.

“How did I get so lucky to have two icons for parents?” she continued. “I love you mom and I could not get through this absolute s— situation without you.

She concluded the heartfelt post with a reference to National Women’s Day: “Oh. And I was just informed it was national women’s day, how fitting for a post on my kick a– mama. #happynationalwomensday.”

It was the fact that she had a life outside of Hollywood that made her the right fit for Perry. “She will be good for Luke,”90210creator Aaron Spelling toldUSA Todayat the time. “She’s not in show business. Her head is on really straight.”

Luke Perry with son Jack and daughter Sophie.

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The couple divorced in 2003 and shared joint custody of Sophie and son Jack, 21, now a wrestler.

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“He was very protective of his family,” a sourcetold PEOPLEearlier this week. “As soon as he became a dad, that was it. It didn’t matter that he was a huge star onBeverly Hills, 90210, or what came after. He always knew what was important.”

On Feb. 27, Luke was hospitalized after suffering a stroke, and after paramedics were dispatched to his home in Sherman Oaks, California. A source told PEOPLE henever regained consciousness.

The actor remained “under observation” for five days but died on Monday, March 4.

Sophie previously paid tribute to her father one day after his death,sharing a photoof her and the lateRiverdalestar to social media.

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“I cannot individually respond to the hundreds of beautiful and heartfelt messages, but I see them, and appreciate you all for sending positivity to my family and I,” she continued. “I’m not really sure what to say or do in this situation, it’s something you aren’t ever given a lesson on how to handle, especially when it’s all happening in the public eye. So [bear] with me and know that I am grateful for all the love. Just, being grateful quietly.”

In lieu of flowers, the Perry family ask that donations be made toFight Colorectal Cancerthis link opens in a new taband St. Jude’s Children’s Hospital.

source: people.com