The 49-year-old star, who was spotted in a new moustache look at the Mumbai Airport, said he waited a year for the fun to begin.
"Dilwale time...Can't wait to see the smiling faces of Rohits team. Waited a year for the fun to begin all over again...Bulgaria Express," Shah Rukh tweeted.
"Dilwale" marks the reunion of the hit pair, Shah Rukh-Kajol, who were last seen in "My Name Is Khan" in 2010.
The "Chennai Express" star, who recently wrapped the first schedule of "Raees", will be joined by the cast including Kajol, Varun Dhawan and Kriti Sanon.