Charlie’s Angels star KATE JACKSON says she is in "financial ruin" — thanks to FARRAH FAWCETT’s business manager.

Jackson, 61, has filed suit against Richard B. Francis, her late costar’s former business manager, and is suing for more than $3 million. 

The suit claims Francis used Jackson’s "extremely close relationship" with Fawcett to land her as a client, but then fouled up.

Jackson alleges Francis incorrectly estimated her wealth, claiming $5.4 million when it was closer to $3 million.

Kate also says Francis urged her to buy a pricey home in California which she couldn’t afford.

According to legal docs filed at Los Angeles County Superior Court, Jackson the "smart Angel",  alleges she "suffered financial ruin at the hands of the very person she entrusted with her finances" .