Bipasha, Karan's Masti Shasti on Saturday

Actress Bipasha Basu and her rumoured boyfriend and Alone co-star Karan Singh Grover was photographed in Mumbai on March 12. Bipasha and Karan, who are often spotted together, found it difficult to control their laughter.

Karan, who was color coordinated with Bipasha in white, smiled ear-to-ear for the paparazzi.

Meanwhile, actor Arjun Rampal checked-in at another part of Mumbai looking handsome in a shirt and denims.

Coming Up: Bipasha's Romantic Birthday Celebration With Karan Singh Grover

Bipasha Basu, who seemed to have celebrated her 37th birthday exclusively with rumoured beau, actor Karan Singh Grover, thanked him for 'a wonderful birthday,' a day later on January 8. The actress instagrammed an image of herself with Karan captioned: Monkeying Around! Thank you for such a wonderful birthday

This image was posted on Instagram by bipashabasu

Karan Singh Grover also shared a picture of the two and wrote: "Happy birthday Bipasha! Thank you for making every moment so beautiful and special!"

This image was posted on Instagram by bipashabasu

The rumoured couple seem keen about making their relationship public if we go by the spurt in the pictures they've been posting on social media - like this one shared by Karan Singh Grover a few days back.

This image was posted on Instagram by karan singh grover

Coming up - A Sneak Peek Into Bipasha's Birthday Celebrations

Actress Bipasha Basu turned 37 on January 7 and it appears that she rung in her birthday on Wednesday midnight with a lovely dinner. The Alone actor offered a sneak peek into her birthday celebrations on Instagram.

This image was posted on Instagram by bipashabasu

Bipasha's birthday cake was definitely yummy.

This image was posted on Instagram by bipashabasu

When Bipasha went shopping for her birthday! She shared this picture only a day before her birthday.

This image was posted on Instagram by bipashabasu