Scott is up for the Player of the Year Award with Gareth and Kyle nominated for the Young Player Award.
The winners will be announced in the PFA Awards' ceremony on Sunday.
"The first time Kyle came into the club you could see he had all the attributes to be a top, top player," said Ledley.
"I was pretty sure then that he would eventually make the right-back position his own.
"It's his first full season for us and it's no surprise that he's done so well. He's been tremendous.
"Everyone knows about Gareth, he's unplayable on his day and he has showed that form again this season.
"Scott's performances have been at a consistently high level for a few years now and he's been a brilliant signing for us this season.
"He's become a fans' favourite straight away and you can see why - he leaves everything on the pitch."