Ranbir Kapoor’s relationship with Katrina Kaif seems to be the biggest open secret in the industry. Though RK and Kat haven’t admitted to it yet, everyone knows that they are together. Recently, at a private party at Pali Bhavan in Mumbai, the two of them were rather forthcoming with their affections towards one another. According to an onlooker, Katrina was constantly stuck to Ranbir’s side and kept hugging him. It seems the two even stole a few kisses when they thought no one was watching. Awww… How cute!