The 36-year-old "Shanghai" star complained about the chilly conditions prevailing in London and hoped that the weather stays warm during his stay.
"Thankfully Mercury's rising here in London... Can't handle shooting in the cold... Brrrrrr... A month more to go ...Hope it stays that way," Hashmi posted on twitter.
"Azhar", which is a biopic about the former Indian cricketer Mohammad Azharuddin, will see Hashmi playing the titular role.
The movie, which is slated to release next year, also stars Prachi Desai, Nargis Fakhri and Huma Qureshi.