Morgan was wearing a grey tee, black jeans and a baseball cap with a multicoloured logo on it – pictures of which can be found here.
A poster shared by friends and family on social media said they “are worried for his safety and welfare”.
As an actor, he is known under the stage name of Lewis Lingford.
He studied at the former Urdang Academy, where he graduated from the professional musical theatre course in 2015.
Solange Urdang, its former Chief Executive, described Morgan as “a beautiful, talented soul who needs to be found”.
“Everyone is concerned for Lewis’s wellbeing,” she told The Stage.
“[If you can tell us] anything, I mean anything however small, please get in touch.”
#MISSING | Lewis is missing from Lambeth. He was last seen on 27th August 2023 and we are concerned for him. If you see him, please call 101 quoting 3460/29AUG23. pic.twitter.com/cGqJDUcZJ3
— Lambeth Police | Central South BCU (@LambethMPS) September 4, 2023
Anyone with information has been urged to contact the Met Police/missing persons on 07770811177 using crime reference number 23MIS029450 as soon as possible.