Debbie Reynolds ''willed herself right off this planet'' so she could be with her daughter Carrie Fisher, according to her son Todd Fisher.

The 'Singin' In The Rain' star tragically passed away in December 2016 at the age of 84, just one day after the sad loss of 'Star Wars' star Carrie, and now her son Todd has claimed that her passing came as a result of her not wanting Carrie to ''be alone''.

According to USA Today, he wrote in his new memoir 'My Girls: A Lifetime with Carrie and Debbie': ''Take it from the son who was there, who knew her better than anyone else on earth. Debbie Reynolds willed herself right off this planet to personally see to it that Carrie would never be alone. That had been her driving force all of Carrie's life, including having me so that Carrie wouldn't be an only child, and it continued to be her driving force when Carrie left.''

The 60-year-old actor doesn't believe Debbie's passing was caused by a ''broken heart'', and admits he ''got annoyed'' when people began suggesting that as the reason for her death.

Further explaining the comments in his memoir during an appearance on 'Megyn Kelly Today' on Tuesday (05.06.18), he said: ''I got annoyed, in fact, when people kept saying that [she died of a broken heart]. That seems to be the obvious response but since I was this close to her when she left, and words were spoken literally moments before she left, there was no way to misinterpret.

''I was sitting with her in her bed. She had some words with me where she really wanted to be with Carrie. I thought she was speaking ethereally, I didn't know she meant in the next 30 minutes. My mother knew how to make an entrance and an exit. I did not know I was witnessing anything of the sort.''

And Todd also insists his mother told him she wanted a memorial to be held for herself and Carrie after her passing.

He added: ''She had said, for example, 'I don't want a big fancy memorial tomb.' And then she to me, hours before she left, 'Maybe it would be good to have something since now that Carrie was gone - fans might want to come and see Carrie and I might want to be there with her.'

''The next thing she knows, she closes her eyes and said, 'I want to be with Carrie.'''