Idris Elba hopes providing more access to football in communities will deter youngsters from knife crime and he urged other industries to follow the Premier League's lead.
"Things like this really help people get off the streets and really do something with their life and make a real powerful change - I think it's such a really important thing," he said in an interview.
"It feels probably to many that not enough is being done," Met Police Commander Stephen Clayman, the national policing lead for knife crime, told Sky News pitchside at the Kicks programme.
"Where there are young people aggregating around football, around teams, should we be messaging that knife crime is no good?
The actor dropped in on a session run by the West Ham Foundation - part of the league's Kicks programme supporting youngsters at risk of anti-social behaviour and youth violence by providing free weekly football.