Arnold, 18, made headlines last week when he was banned from Barbers Hill High School in Mont Belvieu, Texas for wearing dreadlocks, which the school claims is against their dress code policy.
Not only that, but Arnold was not being allowed to walk in his graduation ceremony unless he cut his hair, but Ellen issues a heartfelt plea to the school administrators to change their mind.
Ellen began by telling Arnold she realized this isn't, 'easy or comfortable' for the teenager, but made it clear that she's 'here' for him and that's why he's there.
She added that she didn't understand why he needed to cut his hair in order to return to school, because he gets, 'good grades' and he's, 'never been in trouble.'
Arnold hasn't been in school for weeks because of this issue, as he revealed this started sometime after the Christmas holiday break.
'Every day I would go to school I would always be in dress code. But the thing with them is, if it was let down, I would be out of dress code,' Arnold said.
He said he would usually wear his dreadlocks up, but if the hair would be, 'in your face, past your ears, or touching your collar' it would be considered a dress code violation.
Ellen asked if there were girls in his school with long hair and Arnold said, 'There are plenty of girls at my school with long hair.'
'If I go back to school tomorrow, my only options are in-school suspension or alternative school,' which Arnold explained is for kids who, 'have behavioral issues, sell drugs, fight all the time' are sent.
'Like, I wish the best for them, and I know they have good qualities in them, but I don't deserve to be grouped with them,' Arnold eloquently said, adding that they won't let him walk in graduation with his hair as is.
'I worked for this all my life. I've strived for this. I deserve this moment to walk across that stage and enter into life. My parents deserve this,' he said.
Arnold added that he wants to go to school to become a veterinarian because, 'I've always loved animals, everything about animals, just their sense of loyalty, companionship, you can't get that anywhere else.'
Ellen noted that you have to go to more school to be a vet than you do to become a doctor, before making a passionate plea to Arnold's school.
'I am begging you... this kid is a good kid. He deserves to graduate, to walk with all the other kids. He's a good guy. I just am urging you to do the right thing,' Ellen said.
Ellen added that she thinks, while this has been a hassle for him, it could be an 'eye-opener' for the school, before bringing out her surprise guest, Alicia Keys.
Keys said she was 'so happy to surprise you' and she 'couldn't believe the story when I heard it. I'm super proud of you for standing up for what you know is right.'
She added that her and Ellen called their friends at Shutterfly and they wanted to support and invest in his 'greatness' with a check for $20,000 for his schooling.
Arnold has also gotten support from other celebrities such as Houston Texans football player Deandre Hopkins, who tweeted last week, 'Never cut your locks Deandre Arnold.'