Calvin Harris treated Taylor Swift to a gluten-free pizza.

The health conscious couple are reported to have ordered the specially cooked Italian dish at L'asso on Kenmare St. and Mott St in New York City on Monday night (26.05.15) where onlookers described the pair as ''so into one another''.

The 'Bad Blood' hitmaker relaxed with a glass of white wine, while her DJ beau stuck to water before picking up the bill.

A source told E! Online: ''The place had about 15 tables, so it was very small and intimate. They ordered a salad and then two gluten-free pizzas. Before the food came they were holding hands and they were really engaged with each other. You can tell they were totally a couple and so into one another. They laughed and were talking throughout the night. When the pizza came, Taylor served Calvin a slice of pizza on his plate then gave herself one.

''She took his hand towards the end and put it close to her heart. It was a sincere gesture.''

The25-year-old blonde beauty is thought to have been dating the 'Under Control' hitmaker since March and the pair haven't been shy when it comes to putting on romantic displays.

A close friend of the music producer believes their relationship is going so well as Calvin, 31, sees the Grammy Award-winner as his ''equal''.

They said: ''Women throw themselves at him. He can never tell if they are really interested in him as a person or if the attention is just because of his fame and fortune. But when he met Taylor, it was different. For the first time in a long time here was someone who was his equal.

''They have a mutual respect for one another. They understand one another. They are on the same level and that's been a good starting point for both of them.''