Officers from Lothian and Borders Police will line up against ex-internationals, including Scott Hastings, Doddie Weir, Gary Armstrong and Gregor Townsend.
The clash is in memory of dad-of-two Steve Cully, a police officer who died aged just 41 after suffering a heart attack in September last year.
A keen rugby player himself, he represented Ireland and turned out for Murrayfield, Edinburgh Wanderers, Murrayfield Wanderers, Stewarts Melville FP and Edinburgh Academicals as well at the British Police team.
All proceeds from the event will be donated to the charity Chest, Heart and Stroke Scotland.
The match takes place at 2pm at the force’s headquarters in Fettes Avenue. Entry to the game costs £5, with free admission for under-16s.
Ex-Scotland internationalists Peter Wright and Barry Stewart will also take to the field, with former Boroughmuir hooker David Cunningham and current scrum-half Sam Johnston playing for the police.