Apollo 11 astronaut Buzz Aldrin is suing two of his children and a business manager, accusing them of misusing his credit cards, transferring money from an account and slandering him by saying he has dementia.

In the lawsuit filed earlier this month in a Florida state court, Mr Aldrin asks a judge to remove his son, Andrew, from control of his financial affairs, social media accounts and several non-profit enterprises.

Buzz Aldrin
Mr Aldrin was the second man to walk on the surface of the moon (AP)

Mr Aldrin said his daughter, Janice, did not act in his financial interests, and he accuses his manager of fraud.

He was a member of the Apollo 11 crew which landed the first two humans on the moon. Mr Aldrin joined Neil Armstrong on the lunar surface in 1969.

In a statement, the Aldrin children said they are saddened by the “unjustifiable” lawsuit.