Dev isn't a stranger to dating his co-stars. In 2009,  he struck up a connection with Slumdog Millionaire co-star Freida Pinto, who is his character Jamal's love interest, Latika. The two dated for nearly six years and broke up amicably in December 2014.

But three years later, in 2017, Dev struck up a connection with another co-star of his, Australian actress Tilda Cobham-Hervey, and the two seem to be going strong ever since. That said, the duo keep a low-profile — Tilda's social media presence is set to private, and for his part, Dev seems to be absent from Instagram altogether. 

Dev and Tilda met on the set of Hotel Mumbai, a film they both worked on alongside Call Me By Your Name's Armie Hammer. The Australian-American thriller is based on the 2008 attacks at the Taj Mahal Palace Hotel in Mumbai, and Surviving Mumbai, the 2009 documentary that retells its events.

In the film, Dev plays the character of Arjun, and Tilda plays Sally. But instead of getting to film in India, where the movie is based, the cast and crew of Hotel Mumbai actually shot "like a one-minute walk" from Tilda's house in her hometown of Adelaide, Australia.

"It was really lovely to show a whole lot of people around my hometown," the actress shared with Now to Love. "I really love Adelaide and I think it's an amazing place to work and it's got such a great creative community there, so it was a real treat to be able to introduce a whole lot of people to that space."