Amber Heard said she is donating her entire $7m (€6.18m) divorce settlement from Johnny Depp to charities that will use the money to benefit abused women and sick children.
Heard said that the money would be split between the American Civil Liberties Union and the Children's Hospital Los Angeles.
Heard said the money to the ACLU was being given to help its efforts to combat violence against women.
Heard (30) and Depp (53) settled their contentious divorce on Tuesday - a day before the actors were scheduled to begin a restraining order hearing that would centre on Heard's allegations that Depp repeatedly abused her during their marriage.
Depp denied he abused Heard, and his attorney accused Heard of making the domestic violence allegations to obtain a more favourable settlement.
"As described in the restraining order and divorce settlement, money played no role for me personally and never has, except to the extent that I could donate it to charity and, in doing so, hopefully help those less able to defend themselves," Heard wrote.
Heard writes that she knows the organisations will put the money to good use, and she plans to support them with future donations.
Heard filed for divorce in May and days later obtained a temporary restraining order. She accused the Pirates of the Caribbean star of hitting her during a fight in their Los Angeles apartment in May.