JAB Promotions/WireImage

Brunei's Prince Azim has died at age 38, the country’s government confirmed on Sunday. Azim died in the capital Bandar Seri Begawan on Saturday morning following "prolonged treatment for a serious illness".

No cause of death was disclosed, but numerous outlets report he was diagnosed with liver cancer.

Consistent with Islamic custom, his funeral was held on Saturday, the same day as his death, and the nation is in a seven-day period of mourning.

The prince is the second son of the Sultan of Brunei who fathered 11 children (only three were Azim's full siblings). The sultan was once the world's richest man.

In addition to being fourth in line to the Brunei throne, Prince Azim was a Hollywood movie producer who mingled with the West's biggest stars including Janet Jackson, Mariah Carey and Scarlett Johansson.

Sylvia Linares/FilmMagic

Prince Azim is best known for paying Michael Jackson $10 million to attend his extravagant 25th birthday party in England. The king of pop didn't have to sing a note to claim his huge paycheck. He was paid to mingle with Prince Azim's guests.

MJ Kim/Getty Images

Janet Jackson (pictured with Azim and actress Faye Dunaway in 2009) mourned the prince in a post on her Instagram stories, implying that Azim would be in "no more pain".