On Saturday, we learned that Erin Moran passed away, from what is now being reported as complications from stage four cancer. Yesterday, we paid tribute to the Happy Days star on air and remembered her with a episode centering around her character, Joanie Cunningham.

Throughout the weekend, costars, colleagues and other former child stars took to social media to say goodbye to the actress.

Such sad sad news. RIP Erin. I'll always choose to remember you on our show making scenes better, getting laughs and lighting up tv screens. https://t.co/8HmdL0JKlf

— Ron Howard (@RealRonHoward) April 23, 2017

OH Erin... now you will finally have the peace you wanted so badly here on earth ...Rest In It serenely now.. too soon

— Henry Winkler (@hwinkler4real) April 23, 2017

My sincere condolences. #ErinMoran#HappyDaysFamilypic.twitter.com/5b0AbioZEc

— Scott Baio (@ScottBaio) April 23, 2017

So incredibly sad to hear about Erin. A wonderful, sweet, caring, talented woman.I can't really comprehend this right now.Very painful loss

— Don Most (@most_don) April 23, 2017

#ErinMoran#RIPErinMoran. energetic blue eyes exploded with life, like her smile. Always kind to me. One of America's best little sisters.

— tedmcginley (@tedmcginley1) April 23, 2017

I've known Erin Moran since childhood doing "GunSmoke". More recently as a troubled soul. So saddened to hear of her passing. RIP ERIN xo pic.twitter.com/R3CQyFdlz8

— Willie Aames (@WAames) April 23, 2017

So sad to share that my friend Erin Moran has passed away. Rest In Peace, sweet girl. ❤️ pic.twitter.com/SqThc76LvX

— Erin Murphy (@Erin_Murphy) April 23, 2017

Elsewhere, Cathy Silvers, who portrayed Joanie's friend Jenny Piccolo on Happy Days, shared her thoughts with People magazine.

My best friend. My shinning armor. My example of unconditional love, grace, poise, dignity, strength, talent beyond measure, and above all Erin held my hand throughout my life. My love for Erin is forever. A beautiful person, no luckier woman than I to call Erin my loving best friend. When the casting door opened and I walked in and jumped on the couch to read for Jenny Piccalo we laughed our heads off then Erin threw her arms around me and our journey of friendship began. We were very close on set and grew even closer now.

Anson "Potsie" Williams offered his condolences via an official statement. “Erin was a person who made everyone around her feel better,” he wrote. “She truly cared about others first, a true angel."

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