What film featured both Dave Allen and Melissa McCarthy?
Dave Allen (actor):  Allen had a minor role as an "Electrocuted Ghost" known as "Sparky" in the 2016 film "Ghostbusters". Ghostbusters (2016 film):  The film stars Melissa McCarthy, Kristen Wiig, Kate McKinnon, Leslie Jones, Neil Casey, Andy García, Cecily Strong, and Chris Hemsworth.
Ghostbusters