The family of murder victim Sam Cook say he was well-mannered and funny, and had everything to live for.
Sam was out celebrating his 21st birthday when he was stabbed to death.
Read more: Sam Cook's killer sentenced to life
Carl Madigan, 22, is today starting a life sentence for Sam's murder.
His family say they, too, are serving a life sentence.
In a statement, they said: "Today is not about a trial, a verdict or a sentence for us.
"Today is about Sam who cannot be here as he was brutally taken from us in the most horrendous circumstances.
"Sam was kind, caring, well-mannered and funny. He also had the most infectious smile which we will never see again, only in our hearts and in our memories, which we hold dear.
"Sam was a young, handsome man who had everything to live for, he had such a bright future ahead of him. Instead, we have been denied the chance to see him develop through different stages of his life, all snatched away in a few seconds which has changed our lives forever.
"We have been handed a life sentence, which we will live and breathe for the rest of our lives.
"Sam's memory will be held close and dear by all his family, girlfriend, friends and all who had the privilege to meet him.
"In Sam's memory we would like everyone to support the 'No More Knives' campaign to help educate a new generation about the pain and anguish knife crime can cause, and hopefully prevent another family from going through this horrendous ordeal.
"We would like to thank the following people from the bottom of our hearts:
Merseyside Police; DCI Mark Tivendale, and the whole of his investigation team at the Major Crime Unit; our Family Liaison Officers, DCs Rona Roberts and Julie Bolton; the Crown Prosecution Service; the paramedics; the boys from Birmingham who helped and supported Sam in his last moments; the counsellors, our wonderful families and friends for their phenomenal hard work, support and love; not forgetting the numerous members of the public and others who have shown us such wonderful support and care.
"This is an amazing city, let's be proud of it and keep it that way, in the name of Sam David Cook, aged 21 years and two days.
"Gone, never forgotten, and always by our side."