The Three Lions goalkeeper has spent the last four seasons north of the border, where his form with Celtic earned him a call-up to Roy Hodgson’s squad and attracted the attention from a number of Premier League clubs.
Forster has been in good form for Southampton since his summer switch
And Forster says that it was chatting to some of his England squad-mates that convinced him to make the switch south even though all three of them moved on from the club this summer.
"It's a fantastic club to play for and everyone said that," Forster said.
"I spoke to Adam Lallana quite a lot in the summer and as soon as the opportunity arose he was very complimentary about the club and said I'd love it.
"Five years ago me and Rickie were at Bristol Rovers [Forster spent time on loan from Newcastle], it's been good to be at a World Cup together five years on.
"He's a top player. He sums up what you can do at this club. He's really performed well. He's been an absolute legend for this club coming up through the divisions.
"I can't speak highly enough of the England boys who were here last season and they have not got a bad word to say about the place.
"They will be the first ones to say what a fantastic club it is to play for so I'm delighted that was the choice I made."
With regular first-team football now under his belt, the 26-year-old joins Ben Foster in challenging Joe Hart for the England goalkeeping shirt.
And given Southampton’s excellent start to the season, Forster is sure to be under the watchful eye of Hodgson and his scouts.
"It's important that I play well week by week and see where it takes me," added the Hexham-born stopper.
"For me, it's important to come down and play Premier League football, just to come and do as well as I can for Southampton, first and foremost.
"I felt it was the right time and it was a fantastic opportunity and one that I could never have turned down."
