The Parkhead shot-stopper has joined up with Roy Hogdson's squad for their World Cup qualifier double-header against Moldova and Ukraine as the Three Lions look to book their place at Brazil 2014.
Forster is unlikely to see any match action for Hodgson's side, with Manchester City star Joe Hart nailed on as England's No.1.
But after keeping his sixth clean sheet in 10 competitive outings against Dundee United on Saturday, Parkhead boss Lennon is delighted to see his keeper earning international recognition.
He said: "It is brilliant for Fraser, it is a huge thing for him. He looked back to his very best on Saturday. I thought everything he did was excellent.
"The window has shut and for a lot of managers that is a huge sense of relief because it means that you can now just go with the squad that you have got.
"He has broken that barrier [of getting into the England squad].
"He has been there or thereabouts in the England squad for the last year, year-and-a-half now and deserves it. It is fantastic for him."
Forster is not the only Hoops star who has jetted out for national service this week, with a host of Lennon's players, including Scotland trio Scott Brown, Charlie Mulgrew and James Forrest, set to feature for their countries.
And boss Lennon hopes those who remain on domestic duty will reap the benefits of some down time this week.
He said: "I will maybe take in an international game at the weekend.
"For the likes of Commons, Stokes, van Dijk and Boerrigter, it is a great opportunity for them to get some rest now and that will be important."