The Liverpool defender is confident Sterling can make the plane to Brazil after the teenager's hugely impressive form this season.
Sterling has enjoyed a fine campaign, netting on six occasions in 24 appearances, cementing himself as a key player under Brendan Rodgers.
The Jamaican born 19-year-old has two caps to his England name and was named man of the match in the recent Denmark friendly at Wembley.
Roy Hodgson will name his squad on May 13 and Agger expects Sterling to be included.
He can handle the pressure. Otherwise, he would not play for Liverpool. It is a fantastic opportunity for him," he was quoted as saying according to Sky Sports.
"In case he continues like he is doing right now, I can't see any reasons why he should not get a place in the squad for the World Cup."
"He is a big talent and got qualities that England need.
"Everyone can see that he is very quick and he is technically skilled, too. He has got experience from the best league and that is what really matters for a young player like him.
"To come on and get some matches to prove yourself. In any case, he got what you need to deliver."
The Liverpool vice-captain is right to champion Raheem Sterling's England cause as the winger has truly come to the fore in the Reds' assault on the league title. His pace, trickery and body strength have been real highlights in a season where he has come of age.
Though Sterling has risen to greater prominence he may still have the capacity to surprise at the World Cup, carrying an element of unknown quality that England and Roy Hodgson would surely go amiss not to take advantage of.
Does Raheem Sterling deserve a place in the England squad for the World Cup in Brazil?