Tony McCluskie, 36, showed no emotion as he was told at the Old Bailey that he would serve a minimum term of 20 years.
The judge said McCluskie had done everything he could to discredit his ‘hugely popular’ sister’s character during the trial. And he rejected claims by the skunk cannabis addict that she had pushed him over the edge by being mean to him.
McCluskie was found guilty of murder by an 11-1 majority. He had admitted manslaughter.
Miss McCluskie’s dismembered body was found floating in the Regent’s Canal in east London in March last year. Her head was found in the water six months later.
The 29-year-old found fame in the BBC soap in 2001 when she played Ethel Skinner’s niece.
The verdict was greeted with gasps and cries by members of the family sitting at the back of the court.
After the verdict, Tony McCluskie Senior said he would not desert his son.
He said: “I know that my son, Tony Junior, is suffering too. I will not desert him even though he has committed this terrible crime and taken Gemma’s life.
“I hope and pray that one day Tony will be released from prison with a better understanding of his actions.”