The teenage actress has given $6,200 each to Bournemouth Hospital Charity, Salisbury District Hospital Stars Appeal and Southampton Hospitals Charity to help support National Health Service workers battling the COVID-19 virus.
Brown, who has family ties to Bournemouth, said in a statement, "Britain's NHS workers - and all carers - are an inspiration to us all and are the nation's heroes. I am in awe of every one of them and just wanted to thank those risking their lives - particularly in hospitals on the South coast."
"The area is very dear to me and my family and I cannot wait to visit again soon. Keep up the brilliant work and stay safe. Thank you. You are all amazing."