The actor, who played a lead role in the series The Mechanism, O Mecanismo, died on Wednesday at Miguel Couto Hospital, Rio de Janeiro, Brazil.
His death comes just a week after he endured a horrific car crash.
Emergency services scrambled to Flamengo Park on January 16 after Junqueira smashed into a tree, driving at high speeds.
Paramedics rushed him to hospital as he had lost a large amount of blood, and suffered severe chest trauma and open fractures.
But despite being placed under intensive care, and having surgery a few days later, he died.
Actress Gisele Itie, his ex-girlfriend, led tributes on social media.
Posting photos of herself with Caio, she said: "Here it rains on the 'sunday smile'. And it hurts, how it hurts.
"I just wanted to hold you tight and say how much you are and have always been loved by all of us!
"Even those who did not know you already loved you."
More to follow…
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