Sobbing as she relives the ordeal, former Lindt Cafe siege hostage Seline Win Pe reveals how the gunman told her she had only minutes to live.

In an interview with 60 Minutes, Ms Win Pe says gunman Man Haron Monis looked her "straight in the eyes and said 'you have 15 minutes'".

"I said 'please don't shoot me, please don't shoot me. I only have my mum, please don't shoot me'," Ms Win Pe says, weeping.

The emotional footage is the first interview in a series 60 Minutes is conducting with those who survived the siege that rocked the country in December last year.

On the morning of December 16, Man Haron Monis took 18 people hostage in the Lindt Cafe in Martin Place. He was armed with a gun and forced two of the hostages to hold up a black flag with Arabic writing, known as the Black Standard, in the window.

After 17 hours gunfire was heard coming from the cafe and armed police stormed the building. Sydney barrister and mother-of-three Katrina Dawson and Lindt Cafe manager Tori Johnson both died, as did Monis.

Until now, little was known about what happened inside the cafe, and Channel 9 has reportedly paid handsomely for the privilege.

Fellow survivors Lindt Cafe assistant manager Harriette Denny and employee Fiona Ma have also been interviewed.

"We had to beg for our lives," Ms Denny tells 60 Minutes. "He was going to shoot someone."

The interviews also reveal Monis forced Ms Ma to run errands for him within the cafe.

There are reports five others will also partake in the series of interviews and there has been much speculation about their remuneration.

Former Victorian Premier Jeff Kennett has weighed into the debate, decrying their actions as "plain grubby" on Twitter, saying it is not "morally right" the siege victims profit from the tragedy.

Is it not sad, those involved in the Sydney siege, who's lives were saved are now selling their stories for profit. Terribly disappointing — Jeff Kennett (@jeff_kennett) January 19, 2015