He then studied as a postgraduate in the United States at the Annenberg School for Communication at the University of Pennsylvania.
On returning to the UK, he became an independent producer, with credits including Four Weddings and a Funeral (1994), Lawn Dogs (1995), Notting Hill (1999), Love Actually (2003) and The Eagle (2011).
His television productions include Jim Henson's The Storyteller and the 1996 version of Gulliver's Travels.
Appears in photographs in the credits of Four Weddings and a Funeral (although uncredited) as "Matthew's Gorgeous New Boyfriend".
In February 2015, the National Film and Television School's Board of Governors bestowed an Honorary Fellowship on Kenworthy.