"Just spent the last two days with 30 of the maddest, funnest people… Great to feel friendship, love, real smiles and joy with those who matter. Will miss you Goa… You really are special," Shahid posted on his Twitter page.
"Home to family now… ok people time to get onto that plane and back to reality… Home, family and Kaizer (dog), I miss them… Love you all, thank you," he added.
Several celebrities attended the birthday party including filmmaker Kunal Kohli, photographer Atul Kasbekar, and others including Nargis Fakhri and Tabu.
After the trip, Kasbekar tweeted: "@shahidkapoor Whattey trip. Thank you for the most amazing time. And a happy happy again."
Kohli, who is directing Shahid in his next, wrote: "Had a great time in Goa @shahidkapoor was a great host, two days of just Goa, fun, food and drinks."