Christians, Jews and Muslims came together to hear from speakers of the different faiths and then eat a meal together - when the sun had gone down - with Muslims opening their fast.
Hosted in St John's Synagogue in North London, guests were assigned to a round table and encouraged to ask each other about their different traditions.
It was the Mayor of London, Sadiq Khan, whom many were excited to hear from. His speech focused on the message of unity, saying that is the core of the three faiths. He referenced Jesus' answer about the most important commandment being 'Love thy neighbour'.
Also speaking were the new Bishop of London, Rt Rev Sarah Mullaly, Chief Rabbi Ephraim Mirvis and Cardinal Vincent Nicholls.
Speaking to Premier after his speech, Khan said: "The wisdom in those three speakers is phenomenal and what's great is the humility, to go round the room and listen to young people."
"You've got three of the most senior religious people in this country giving their words of wisdom but also listening to young people."
When asked if there was more of an openness towards religion than the previous generation he said: "Politicians of my generation thought it was to taboo to talk about religion and your faith - I don't think it is.
"Actually, faith comes from organised religion, but it comes from other things as well. And so I think we shouldn't be embarrassed about it."
Listen to the interview with Sadiq Khan, speaking to Premier's Cara Bentley here:
The new Bishop of London, Sarah Mullaly praised London in her speech for being incredibly diverse, saying: "There is something in that diversity that we need to celebrate.
"Living alongside each other is not always straightforward and often those challenges for us come in our misunderstandings."
"I believe we have more in common than what divides us" she said and gave the example of how people from all three faiths fast.
She added that bringing people of different religions together was "not only good for us, not only good for our faith but it is also better for London."
"We have the opportunity to strengthen a city that is already strong" and she encouraged members of the audience to take small steps in showing love to each other.
Ephraim Mirvis, the Chief Rabbi said it was a statement of Bishop Sarah's commitment to young people that she chose this Iftar to attend as it was specifically focused on the next generation.
Cardinal Vincent Nichols from the Catholic church said: "I would like to follow Bishop Sarah in her point about the importance of fasting... it's a very important part in the rhythm of your faith and the rhythm of mine."
After a group selfie, there was an opportunity for members from each table to propose ideas to the speakers about how to improve dialogue as the speakers toured the room.
The fast was then opened after 9pm and guests shared in a meal in the synagogue of rice, samosa, fish and salad.
Stay up to date with the latest news stories from a Christian perspective. Sign up to our daily newsletter and receive more stories like this straight to your inbox every morning.
