Socialite Paris Hilton is keeping to her post-prison promises by helping the less fortunate - she has made an "extremely generous" donation towards the construction of a children's hospital in Los Angeles.

The star has put an undisclosed amount of her own money to help with the building of a new wing of the Children's Hospital Los Angeles, according to hospital officials.

Hilton made a promise to become a better person after spending 23 days in jail last year following probation violations on alcohol related reckless driving charges - claiming she wanted "to help raise money for kids and for breast cancer and multiple sclerosis".

The money donated by the hotel heiress will go towards a Children's Centre for Cancer and Blood Diseases and will open in 2010.

The blonde beauty comes from a family of charitable folk - her grandfather William Barron Hilton was named as America's top charity donor of the past year after handing out $1.2 billion to charity via the Conrad N. Hilton Foundation in 2007.