"It's a group of players that have been together for three or four years that have got us to number one", said Willey on Archer's proposed inclusion in March.
Jofra Archer was rewarded for impressing in his early auditions on the global stage by getting a late call-up to England's squad for the Cricket World Cup, as David Willey's worst fears were realised.
"I'm ready, " said Archer, who has made his name in Twenty20 cricket, notably with Rajasthan Royals in the IPL.
Full England squad: Eoin Morgan (capt, Middlesex), Moeen Ali (Worcestershire), Jofra Archer (Sussex), Jonny Bairstow (Yorkshire), Jos Buttler (Lancashire, wk), Tom Curran (Surrey), Liam Dawson (Hampshire), Liam Plunkett (Surrey), Adil Rashid (Yorkshire), Joe Root (Yorkshire), Jason Roy (Surrey), Ben Stokes (Durham), James Vince (Hampshire), Chris Woakes (Warwickshire), Mark Wood (Durham).
Archer can bowl at over 90mph, as well as offer quick runs with the bat.
And for all his lack of England experience, Archer believes the time he has spent in the IPL has been good preparation for the pressure of a World Cup.
"I'd quite like to get Virat Kohli out because I wasn't able to in the IPL", Archer told Sky Sports.
"Really exiting to be a part of a big summer for English cricket".
Archer downplayed any fears his call-up would cause any friction in the squad, saying he had been welcomed "with open arms" by teammates for the three matches he played.
"I think I probably have a bigger advantage over some of the other guys in our team", he said.
"To be honest, global cricket is probably the same intensity as the IPL".
Archer, whose father is English, only became eligible for England this year after a change to the ECB's rules in November.
Archer was also omitted from the initial squad but the Barbados-born paceman has been named after making a positive impression during England's 4-0 one-day worldwide series defeat of Pakistan.
"David could easily have been in this World Cup squad, he deserves to be but that's sport sometimes there are more deserving players than there are places in the squad", Smith further added.
England now have two warm-up matches, against Australia on Saturday and Afghanistan on Monday, before launching the tournament against South Africa at the Oval on 30 May.