Moffatt was born on 6 December 1919 in Hammersmith, West London (England). He first worked as a call boy at Shepherd's Bush Studios, until actor Tom Walls suggested him for a bit part in the 1934 film A Cup of Kindness. Moffatt appeared in five more films, in mostly uncredited, minor roles, before getting his big break in Will Hay's Where There's Will (1936), then going on to appear in many more of Hay's films, alongside Moore Marriott.
A Canterbury Tale
Back-Room Boy
Doctor Syn
The Clairvoyant
Sei Onde Fica o Paraíso
Mother Riley Meets the Vampire
Ask a Policeman
Oh, Mr. Porter!
Where There's a Will
Good Morning, Boys!
Convict 99
Old Bones of the River
Windbag the Sailor
Where's That Fire
Time Flies
I Thank You
Charley's (Big-Hearted) Aunt
Cheer Boys Cheer
Owd Bob
O-Kay for Sound
