Simon Monjack reportedly had two secret children at the time of his death.

The British screenwriter - who was found dead last month just five months after wife Brittany Murphy died - is said to have hidden the existence of the kids from two previous relationships and allegedly owed both mothers child support.

According to website TMZ, Simon’s family - including his brother, mother and therapist - discovered emails requesting money on his laptop after staying with Brittany’s mother Sharon last week.

The documents on the computer claim he had a son from one woman and a daughter from another.

Evidence of money transfers were also found showing Simon sent $48,000 to his lawyer and other amounts overseas.

The screenwriter’s family have now passed the computer on to investigators, while his mother-in-law has filed a theft report with police after the laptop went missing.

Following his death, Simon - who had claimed he and the actress were ready to try for a family right before she died - was laid to rest next to his late wife.

Family spokesman Roger Neal said: “It was his wish to be laid to rest next to her.”

Murphy died in December at the age of 32.