American actor and writer Rob Delaney has admitted that he’s still a "mess" 14 months after the death of his two-year-old son Henry.

Henry passed away last January after battling cancer, with Catastrophe star and co-writer Rob breaking the devastating news a month later on Facebook.

The 42-year-old American has spoken out before about Henry and his experience with the NHS - who treated Henry - but he's now laid his soul bare in an interview with London's Evening Standard.

"I’m a mess," he admitted. "My child died 14 months ago and I’m basically a bag of wet rubbish. I need a lot of help.

"It has been very hard. It comes in waves. I’ve learned to not control how the waves come. Right now I’m sad a lot."

Delaney was speaking at the Rainbow Trust’s annual fundraiser Trust In Fashion, which was held at Grosvenor House, Park Lane, in London's Mayfair.

Rob Delaney with Catastrophe co-star and co-writer Sharon Horgan

The charity, which supports the families of seriously ill children, is helping Rob, his wife Leah and their other two sons through the process of coping with Henry’s illness and death.

Delaney added that he was speaking about his feelings so that someone else suffering with a bereavement doesn’t "feel like some a**hole from TV has it all together".

Explaining that they were connected with the Rainbow Trust at the end of a seven-month stint when Henry was being cared for at Great Ormond Street Hospital, Delaney said: "The care worker assigned to us was a woman named Fiona who was just amazing, and remains so. She still comes and visits us sometimes.

"At that point we didn’t know Henry was going to die. We knew he was disabled by his tumour and his surgery. Fiona was like a paratrooper who just drops in and has the skill set to help people in unbelievable pain and fear."