The actress has taken time off from the shoot of Double Dhamaal, which is currently being shot in Macau, to attend the celebrations.
Kangna's sister Rangoli had suffered an acid attack in Dehradun in October 2006, sustaining injuries to her face, arms and eyes. The motive was allegedly unrequited love
A source said, "Kangna is very close to Rangoli and has done every possible thing to make it a dream wedding for her.
She has planned the entire wedding and made sure that all goes well on D-Day. However, since Kangna is shooting in Macau, she will not be able to spend much time at home.
She will be present only for a day to attend the ceremony."
Though Kangna was unavailable for comment, her publicist confirmed that she will be flying down for a day for the wedding.
Rangoli is tying the knot to Ajay Chandel, a businessman from New Delhi. It is said that the two were in love since college and just recently Ajay had popped the question.