Cook made his international debut in the England international friendly against Italy. The 21-year-old is supported by Bournemouth boss Eddie Howe, who has backed the midfielder for a World Cup spot.
He said: ''We have never had a full England international play for Bournemouth so I'm sure I speak for many Bournemouth fans in congratulating him. I was very proud of him and it was a great moment for his family as well.''
The Bournemouth coach added: ''To do it at Wembley in that type of game against Italy, it was just really, really special and I thought he did well in the game as well so I'm delighted for him. Hopefully this is the first of many caps for him.''
Howe then went on to say that Cook would be supported by the club in securing a seat on the plane to Russia in the summer.
He added: ''We want to try and help him get there in any way that we can, but he has to take care of his form with us and I think that is the priority and he now has to really focus on our next game.''