Big B even shared a few photographs of his meeting with his fellow actors.
"Met the lovely Tabu and Salman shooting on next floor...always a joy to be with colleagues. Salman shooting on next floor...met up and enquire of his nerve ailment...he is improving," Big B posted on his Twitter page in the early hours of Thursday morning.
"He says he is recovering fast...good," added the 70-year-old, who turns a year older on Friday.
Referring to Tabu, with whom he worked in the film Cheeni Kum, he posted: "Such a warm-hearted loveable friend."