James Bond star Pierce Brosnan tried everything in his power to help his cancer-stricken daughter in the last years of her life, according to a close family friend. Charlotte Brosnan passed away on 28 June (13) after a battle with ovarian cancer, the same disease that killed her mother Cassandra Harris, the Irish actor's first wife, 22 years earlier. According to Lisa Paulsen, president of the Entertainment Industry Foundation and Brosnan's longtime pal, the Hollywood star had hoped Charlotte would beat the cancer and pushed to get her into the latest clinical trials. Paulsen tells People.com, "Pierce was willing to pick up the phone and call anyone, go anywhere, take her anywhere, do anything for her at anytime. He was desperate. After Cassie passed away, Pierce became a fierce champion and ambassador to all things related to women's cancer research." Paulsen has consoled her friend by assuring him his efforts haven't been in vain: "I told Pierce, 'Despite the fact that Charlotte didn't end up benefiting from long-term new ovarian cancer therapies, so many things that you have done have led to so many discoveries'. He's a remarkable and loving father, and Charlotte was such a trooper." Brosnan, who married second wife Keely Shaye Smith in 2001, paid tribute to his daughter shortly after her death, praising Charlotte for fighting the disease with "grace and humanity, courage and dignity". She was Harris' daughter from a previous marriage, but Brosnan adopted her and her brother Christopher as his own after their father's death in 1986.