The Japan-born youngster opted to represent the country of her father, Stu, and could become Britain's youngest ever summer Olympian.
On August 5, the opening day of the Park skateboarding event in Tokyo, she will be just 12.
Brown would eclipse the longstanding British record of former swimmer Margery Hinton, who was just over 13 when she competed at the 1928 Olympic Games in Amsterdam.
In order to qualify, she has to be ranked in the top 20 skateboarders in the world in her discipline at the end of the Olympic qualification period (31 May 2020).
A maximum of three athletes can qualify from any one country for each discipline and gender.
“Hopefully I can go to Tokyo because I want to go there while I am young and to show every girl that you can do everything" Brown, who learned to skateboard aged four, said to the Guardian.
The skateboarding sensation is also an accomplished surfer and a social media star, with 325K followers in Instagram.
Thanks to her impressive skills she racked up thousands of views on her Youtube channel.
Despite her young age, she proved to be a world beating dancer as well, when in December she was crowned the first-ever champion of Dancing with the Stars: Juniors alongside J.T. Church.