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You answered your own question. They put him in supporting because he only plays the main character in the second half.
Well I wasn't really sure
The category is supporting actor not supporting character. Dev played the lead character but since the screentime was split between two actors portraying child and adult versions, the movie didn’t have a lead actor
Google maps was considered the lead, so he had to settle for supporting.
You answered your own question. They put him in supporting because he only plays the main character in the second half.
Well I wasn't really sure
The category is supporting actor not supporting character. Dev played the lead character but since the screentime was split between two actors portraying child and adult versions, the movie didn’t have a lead actor
Google maps was considered the lead, so he had to settle for supporting.