We spoke to our close source about his appearance,
"The whole cast and crew of Kal Kissne Dekha were shooting in Cape Town for an important sequence and while their shoot they heard that Sanju was there too shooting for Ajay Chandok's Chatur Singh Two Star, so later on Bhagnaniji went on his sets to meet him, along with Jackky, who told Dutt that he was a big fan of his acting and requested him to come on his sets".
Further our source told us that, "Sanjay came on the sets the same evening after his pack-up and Jackky was very happy and told him that it was his childhood dream to be in the same frame as him.
He then requested Sanju Sir to be part of the title track they were shooting on one of the beautiful locations of Cape town and with-out any hesitation Sanju instantly agreed. The song goes like "Jashn Josh Hai..." and in the song Sanju baba plays a DJ."
Kal Kissne Dekha is directed by Vivek Sharma of Bhoothnath. Jackky is paired opposite Vaishali Desai who is related to film director and producer, the late Manmohan Desai. Apart from Sanjay Dutt, Salman Khan also made an appearance on Jackky's birthday party, so lots of happening for Jackky's Kal Kissne Dekha.