Keiynan's career started in 2007 when he got his debut film Razzle Dazzle. In 2012, he got a role in a well-known teen drama of Australia Dance Academy and which is going to hit the television screen in 2017, Dance Academy is also releasing in a form of Film.
In August 2015, In the second series of The Flash Keiynan got a role. On 2014, May 20; Keiynan released his first single on iTunes titled "One and Only".
Lonsdale belongs to the mixed ethnicity and Australian nationality. Keiynan is a young man who is gradually succeeding in his musical, dancing and acting career and has a million eyes on him. Moreover, his recent role as Kid flash in the third season of The Flash has earned him a lot of appriciation but the information about his personal life and girlfriend is still not flashed by The Kid Flash to his fans. Keiynan Lonsdale's recent day net worth is estimated to be around U.S $ 500 thousand as of 2016.