The Southampton captain is widely expected to be named in Roy Hodgson's England squad for this summer's showpiece on Monday.
Following another fine season on the south coast, Lallana is also in contention for a starting berth for England's World Cup opener against Italy on June 14th.
And the 26-year-old, who was named on the six-man PFA Player of the Year shortlist, admits that, despite all he has achieved with the Saints, playing in Brazil will top everything.
"The World Cup is the pinnacle," Lallana told The Sunday Telegraph.
"Even to have the chance of being there is something I am immensely proud of."
Lallana also was full of praise for Hodgson and believes that, with all preparation planned, England are in good hands going into the tournament.
"We'll be as well-prepared as any other nation, if not more," Lallana added.
"He (Hodgson) has got a very good style, and is highly experienced at all levels, having managed in different countries.
"That experience is going to be vital when you are taking a team to Brazil for the World Cup.
"I can't wait to get on the training pitch with him again."