Nicholas’ mother, Jennifer Brady, said her son had developmental delays, but he had selective mutism causing silence.
He'd make the movements to cry but no sound would be produced, she told KYW.
When he was 10 years old, Nicholas was finally able to tell her something. He grabbed her phone and typed out "I can't speak," Jennifer Brady told the television station.
Nicholas ended up attending a charter school online where no one knew he couldn’t speak.
>> Read more trending news
His guidance counselor found out at the end of the first year when she spoke to his mother.
Thanks to hard work by Nicholas, as well as counselor Adrianne Erb, his teachers and his mother, he was finally able to speak.
"It was kind of like when you have something on the tip of your tongue. I couldn't verbally say it," Nicholas told KYW.
INSPIRING: A teenager who spent his life almost silent has found his voice. Nicholas Brady graduated high school with a 4.0 GPA and even delivered a speech at the graduation ceremony!Posted by CBS Philly on Friday, June 14, 2019
>> Need something to lift your spirits? Read more uplifting news
"I didn't think my son would be successful with school and I certainly didn't think he would be a speaker at a graduation ceremony when speaking was the one thing he struggled with the most," Jennifer Brady told KYW.