His big sister Rebekah Elmaloglou played Sophie almost 10 years ago.
He joined Keane Kids at the age of 2 and still remains with the group and take singing and acting classes.
Sebastian loves playing the part of Max as he gets to meet new people all the time.
The only downside is that Max loves to surf which means Sebastian has to go out in the water on very windy days.
His favourite school subjects are history and design and technology .
He lives at home with his parents and his cousin.
Apart from Rebekah he has 3 older siblings.
He has 2 birds called Will and Tom.
He loves The Simpsons and Star Wars and loves listening to The Beatles.