Ranbir Kapoor celebrated his 37th birthday on Saturday. The actor's girlfriend Alia Bhatt, who is also his co-star in their upcoming film Brahmastra, did a lot of preparations for his birthday. From throwing a party to baking his favourite birthday cake, she went all out.

Their relationship has surely evolved from being single to seeing a future together, and the latest season of Koffee Time Machine is all set to explore this relationsship between Ranbir Kapoor and Alia Bhatt, all over the years. From Alia Bhatt's confession that she had her first boyfriend in 10th standard, to wanting to marry Ranbir Kapoor, a lot will be visited in the episode.

When Shah Rukh Khan was asked who did Alia Bhatt date, he said, "Everyone." Back in 2010, when Ranbir Kapoor was asked who is he dating, he just went on to state, "Nobody right now." On being probed further, he mentioned, "I am linked with every co-star." A similar thing happened with Alia Bhatt a few years later. Clarfiying the same, the actress mentioned, "Initially yes, I did hang out with Varun a lot because Sid did think I was very young and he would talk to me also like a child." When asked if she felt bad about Sidharth not hitting on her, Alia refused and added, "He'll hit on me some day."

Ask Ranbir if Deepika was talking about him when she mentioned a last lover cheated on her, he said, "We have a very healthy relationship. I am a really dear friend of hers. That's how it is." Kareena, revealing that Ranbir was indeed in a relationship with Katrina Kaif, stated, "He's in love. Are you in love with Katrina? You asked for this, Ranbir."

Years later, during Badrinath Ki Dulhania promotions, when Alia was asked about her relationship status with Varun Dhawan, she said, "He's a friend. Our relationship has also evolved over the years. We started off very close, then even closer, then drifted apart, talking again. It was on and off. We've had our share of ups and downs and now we've reached a very comfortable place with one another."

When Deepika was asked how to get over the awkwardness, she said, "Acceptance," to which Alia added, "There's nothing to feel very bad about. We're all very happy." In his last episode with Ranveer Singh on the couch, Ranbir had confessed, "I believe I'm going to fall deeply, madly in love with somebody who's going to love me back deeply and madly."

In her 2013 episode with Parineeti Chopra, Alia too hd stated something which might soon turn into reality. She said, "I still think he's really adorable and I still want to marry him (Ranbir Kapoor)."