Summer shot for five weeks in and around Bolsover, Derbyshire. Post-production will start in Glasgow next week.
Robert Carlyle, Steve Evets and Rachael Blake star with newcomers Sean Kelly, Matthew Workman, Jo Doherty, Christopher Russell, Jo Tulej and Bethan Davies. The supporting cast includes Kate Dickie, Michael Socha, George Costigan, Julia Ford, Clare Kerrigan and Deborah Findlay.
Gleenan previously directed TV drama Gas Attack, which won the best new British feature award at the Edinburgh International Film Festival. His Yasmin won prizes in Locarno and Dinard.
Camilla Bray is producing Summer for Sixteen Films with co-producers Mediopolis Koln and Cinema Two. Also on board are Scottish Screen, EM Media, Hewland International, Filmstiftung Nordrhein-Westfalen, Glasgow Film Office and the UK Film Council's New Cinema Fund.
Hugh Ellis wrote the screenplay about two tumultuous teenage friends who have to reflect on one intense summer years later.
Joy Wong of sales company The Works International said: 'We were immediately drawn to Summer as the story is both moving and gripping and the characters are beautifully drawn. Combined with Kenny Glenaan's talent as a director, we look forward to presenting the finished film next year.'
Vertigo Films plans a 2008 UK release.