The family of murdered schoolboy Jimmy Mizen said they were "determined" that something positive should come from his death as they commemorated the fifth anniversary.
Jimmy was killed on May 10 2008 - the day after his 16th birthday - after he was attacked in Lee, south-east London. Jake Fahri is serving a life sentence for the teenager's murder.
Since his death the family have set up the Jimmy Mizen Foundation, which works to raise young people's awareness of the consequences of violence.
Today also marks the start of a campaign dubbed #Jimmy21 - three weeks of action including sponsored challenges and community initiatives.
Barry Mizen told ITV's Daybreak that the last five years had been "tough but encouraging", the day after his son should have celebrated his 21st birthday.
His mother Margaret said she has managed to cope with the pain of his death through her faith:
Today his parents Barry and Margaret, along with the rest of their family, will mark the anniversary of his death with a special memorial service at St George's Cathedral in Southwark, expected to be attended by family and friends, as well as some politicians.
Mr and Mrs Mizen, as well as son Danny, will speak at the service, and their son Tommy will sing a song he wrote as a memorial to Jimmy.
Tommy told Daybreak: "[The anniversary] does come around unfortunately, and I don't think today is any harder than any other day if I'm honest, it's something we have to live with every day."
Since Jimmy's death in 2008, his parents have refused to hate his killer, instead campaigning against violence and calling more to be done.
This week Mrs Mizen said: