Southampton have added two more players to the academy ranks, their official website has revealed.
The 16-year-old Bellis constitutes a coup for Saints, having joined from boyhood club Manchester City. Although he is predominately a striker he is also capable of operating on either wing.
Rus joins the club after leaving Yeovil Town and plays as an attacking midfielder. Both players will compete for a chance to play in the Under-18s Premier League.
On joining the south coast club Bellis said: “It’s a lovely place, it seems like a nice family club and I’m pleased to be here.
“From the first time I came down to Southampton to have a look I liked it instantly. The tradition of the club is attractive to young players like me.
“They bring through great players. It’s a new environment full of new people. Every young player needs a chance and I don’t think many other clubs recognise that.”
Rus, who is originally from Romania, said: “It’s overwhelming to be here. As soon as I visited Southampton I was amazed.
“I’m very excited. I was away with Romania on international duty when I first heard of interest from Southampton.
“My family are all very proud and being here is the first step towards achieving my dream of becoming a professional footballer.”