Robin Gibb has shown flickers of life after his brother and fellow Bee Gee, Barry Gibb, started singing to him to try and bring him out of a coma, the Daily Telegraph reported.
Robin Gibb moved his eyes and made an attempt to speak after his brother sang to him and his children played music, according to the Telegraph.
There are hopeful signs of recovery, he is not out of the woods yet, a source told the Sun Newspaper.
Barry and his family, including Robin's wife Dwina, have been carrying out a bedside vigil playing music and praying for the singer since he fell into a coma on Friday.
The family is extremely grateful for all the support they have received from his fans. Thousands of people are saying prayers every day, Dwina told the Impartial Reporter.
She told the newspaper that she has taken inspiration from her husband's latest work Don't Cry Alone, which was written to commemorate the Titanic. Robin Gibb was forced to cancel his appearance at the premiere of Titanic Requiem on Tuesday, which he composed with Robin-John.
His spirit has been shattered since the pneumonia and he has gone visibly downhill. Before he slipped into a coma he was struggling to get out of bed without a wheelchair, a family friend said.
Gibb was first diagnosed with cancer 18 months ago, when he was undergoing bowel surgery. The doctors found a tumor and diagnosed him with cancer of the colon and later with cancer of the liver.
His friends revealed that the 62-year-old had a bucket list, which he kept by his bedside at the hospital. One of Gibb's main wishes before he dies is to set up a children's charity involving music, his friend told the Daily Mirror.
Gibb was born in England in 1949. He founded the Bee Gee's with his twin brother Maurice and moved to Manchester to start performing. The Bee Gees released their first record in 1963. The brothers rose to fame for their hit records Jive Talkin, Stayin' Alive and Night Fever.
Robin Gibb's most recent performance was sin February, when he took to the stage to support an injured serviceman and women at the Coming Home charity concert in London.