Kalen Gardner (born 1999/2000) is the eldest son of Elle Gardner.
In April 2017, Jez Andrews woke up in Kalen's bed after they'd slept together. Upon realising that Kalen was Elle's son, Jez made a quick escape but fell down from the gutter in the process. When Elle later found out from Kalen that he'd slept with Jez, she confronted him in the middle of the ED. Elle later apologised to Kalen about confronting Jez, but admitted that she was just surprised that he was gay. (CAS: "When the Whistle Blows")
In October, Elle called Kalen and his brothers into the ED after her boyfriend Marty Williams experienced an extreme allergic reaction to chilli powder that was sprinkled in his underpants. When it transpired that Blake was the culprit, Blake apologised and Elle formally introduced her sons to Marty. (CAS: Series 32, Episode 10)