The Irons boss reveals that healthy competition is why West Ham are doing so well.
Bilic and co are going great guns in the Premier League too, with the Irons fifth in the table and just one point behind fourth-placed Manchester City in the race for Champions League qualification.
And the former Besiktas boss has explained that the Irons' excellent form is simply down to having a healthy amount of hunger and motivation from within his squad.
"We are confident because we are playing good, we are training good. We are buzzing, we are training hard. If there is time to train, we are training hard," the Croat told The Express.
"That is the biggest secret. We have good players who are hungry, who are motivated. Now we have the players back from injuries, we have 18 players that you can easily treat as regulars."
The future certainly looks very bright for West Ham, who will also move into the Olympic Stadium during the summer after 112 years at the iconic Boleyn Ground.
It promises to be an emotional day when the Hammers take to Upton Park for the final time on May 7, but knowing European football awaits at their new home might make it that bit easier to bid farewell.