The 18 year-old winger said: “I am delighted and can’t wait to get back and started for the season."
Robertson joined the club at U11s level and revealed the reasons behind his decision to remain with Palace: “Crystal Palace are very much the team of south London at the moment.
“I have worked with Richard Shaw, Dave Reddington, Paddy McCarthy and Jack Mesure; they’ve all been good coaches. It’s great for me that Dave is now a first team coach, so if I get the chance to go over there with the seniors, he will help with my transition.
"The talent the club have brought through – Zaha, Scannell, Moses and Clyne – they are all players that I can relate to with their attributes.”