Is marriage on the cards for Bipasha Basu and Karan Singh Grover?

Mumbai: Though Bipasha Basu and Karan Singh Grover have not admitted about their relationship, there are reports that the two are going very strong and might soon walk the aisle.

After holidaying in Maldives, the two flew down to the country after celebrating Bipasha's birthday. But looks like the celebrations weren't over as Karan threw a surprise birthday bash last evening and invited family members and close friends.

Karan shared on Instagram with Bipasha and her mother with a caption that read, "The most important night of my life...In the midst of angels... Lucky me..."

Meanwhile, Bipasha too posted few inside pictures from the party but her photo with beau Karan read, "And you did really well again @iamksgofficial ! This was awesome!Thank you."

Going by the caption we wonder what 'important night' is Karan referring to?Are they giving away a hint of marriage being on cards?