Hirst signed his first professional contract at Hillsborough on Wednesday, after impressing for the club's Under-18s this season and scoring twice on his debut for England's Under-17s.
But having passed on his congratulations to the 17-year-old, who's the son of Owls legend David, first-team right-back Palmer assured him the "hard work starts now".
Congrats mate! Hard work starts now https://t.co/UUeV6hOLlz— Liam Palmer (@LiamJPalmer) March 30, 2016
Then after poking fun at Hirst's dress sense, Bullen, a former Wednesday captain, reinforced what Palmer had said to him.
@BullenFootball are they that bad bully!? time to really kick on— George Hirst (@9Hirsty) March 30, 2016
Palmer knows all too well the level of work required to progress from Wednesday's academy and into the first team.
The 24-year-old, who's shared his place with Jack Hunt this season, has been the Owls' regular right-back for the past three seasons, following a season on loan at Tranmere Rovers.
Palmer made his senior debut six years ago, as a central midfielder, but was unable to tie down a regular place in the team.
Hirst can also look to Joe Wildsmith for inspiration, after the former academy goalkeeper broke into Carlos Carvalhal's first team this season and earned a call-up to England's Under-21s.