Grown-up Vancouver child actor goes under the sea in "The Little Mermaid"

A Vancouver child actor is gearing up for a significant role in The Little Mermaid, and many people are surprised that he isn’t so little himself anymore.
Jacob Tremblay, born in Vancouver, BC, is playing Flounder in Disney’s live-action version of a classic animated film.
Tremblay, who might be best remembered for his role in the 2015 film Room, shared a photo from a The Little Mermaid press tour, and the comments are filled with surprise at how much the actor has grown up.
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“Sometimes I forget [you’re] not a baby anymore,” wrote one person in response.
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“Whew you got tall,” said another response.
Others seemed angry that he’d grown up.
“WHY ARE YOU GROWN,” was one of the comments.
“Jacob Chalamet š³” was another much-liked reaction.
Tremblay’s role in The Little Mermaid adds to an extensive resume of voiceover work for the Vancouver actor. Some other stand-out roles include playing Robin in an animated series about Harley Quinn, and he was a shining star in the Doctor Sleep film.
Some were caught off guard by the new look for Flounder:
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Is there a role you best know Tremblay for?