He is yet to play first-class cricket for the Red Rose this summer as he has been playing for the Rajasthan Royals - hitting five straight half centuries after being promoted to open the batting in the IPL.
Buttler, who played the last of his previous 18 Tests in December 2016 but is an inked-in white-ball player for his country, will be back as a specialist batsman - with Jonny Bairstow retaining the wicket-keeping gloves.
"The first thing we talked about as a selection panel - and it coincided with one of my first trains of thought coming into the job - was how could we..."
Jos Buttler has been in a rich vein of form in the IPL this year, scoring five back-to-back fifties for the Royals at the top of the order.
Had it not been for an injury to Bess's teammate at Somerset, Jack Leach, he probably wouldn't have been selected for this match. He has not played a first-class match since September.
"We will definitely miss Jos and Stokes, but as a cricketer, I really feel happy for Jos that he has been picked in the Test squad".
Former No 1 Karolina Pliskova bashes umpire's chair with racquet after loss
Karolina Pliskova is now the world number six in the women's singles rankings, and topped the pile as recently as July 2017. After the match, Pliskova didn't shake hands with the chair umpire and struck the chair several times with her racket.
The England squad also features Somerset off-spinner Dom Bess, who was given a first call-up.
The announcement was made after new chief selector Ed Smith met with national head Trevor Bayliss, fellow selectors Mick Newell and Angus Fraserand the English Test Captain Joe Root.
Smith said it was "the flawless moment" to reintroduce Buttler to Test cricket, adding: "He will bring unique qualities to the Test team".
There is still no place for Moeen Ali, who was dropped for the second Test in New Zealand in March, while Mark Wood and Chris Woakes seem likely to battle it out for one spot in England's seam attack alongside James Anderson, Stuart Broad and all-rounder Ben Stokes.
Dom Bess was close to speechless when Ed Smith interrupted his morning trip round Ikea to tell him he was in line for a Lord's Test debut against Pakistan next week. He has impressed everyone with his performances for Somerset and when he has been given opportunities with England representative teams.
Smith said: 'With Jack Leach missing out through injury, the selection panel wanted to invest opportunity in a young spin bowler. "Dom's strong form, character and all-round abilities presented a compelling case".