"I could not be more excited to play this wonderful character for another season. And I am even more thrilled that it means another year hanging with some of the best cast and crew around. Season 3 of @alexaandkatie is HAPPENING my friends! Woohoo!" Thiessen wrote in an Instagram post Friday.
"Alexa & Katie" is about lifelong best friends whose journey through the challenges of high school are complicated by Alexa's battle with cancer, a synopsis from the streaming service said.
Series creator Heather Wordham will continue as the show's executive producer in Season 3.
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