Prince William and Kate Middleton used their signature sign of affection in a rare sweet moment.

On Tuesday, the Duke and Duchess of Cambridge stepped out together for a joint engagement in London. They were very affectionate in some photos, which melted the heart of royal fans since the future king and queen rarely display their affection in public. Prince William and Middleton’s signature sign of affection is giving each other a subtle touch.

In the snaps shared on Instagram, Prince William and Middleton can be seen touching each other’s arm as if they are assisting each other. In another shot, the Duke of Cambridge is placing a hand on his wife’s back.

Netizens praised the couple with one describing them “brilliant pair.” Another said that Prince William and Middleton are a “brilliant couple.”

Meanwhile, many were also impressed with the future king’s speech. According to a royal fan, Prince William got her heart after his speech. A different netizen also added that the duke’s speech was heartfelt.

“Did anyone catch william give his speech ? It was from his heart with no written notes and it was a little over 6 mins. Our future king,” the online user wrote.

While Prince William and Middleton are not as tactile as Prince Harry and Meghan Markle, many noticed that they have become sweeter lately. A snap of the Duke and Duchess of Cambridge staring at each other was shared on Twitter and royal fans couldn’t help but react.

According to the netizens, they could sense the couple’s passion, love and respect for one another. Another said that they were a “perfect couple” and “soul mates.”

“College sweethearts! I love their love story, the part that the prince fell in love with a commoner and the Queen is supportive, his family is supportive;it’s a matter of Catherine accepting the royal life and is handling it well & with three kids now. I love their happy ending,” one royal follower named Stephany Esqueda wrote.

In related news, Middleton is reportedly holding peace talks with Markle, Prince Harry and Prince William. The duchess is reportedly keen in ending the feud between them.

Kate and William are the first British royals to come to Pakistan since William's father Charles visited with his wife Camilla in 2006
Kate and William are the first British royals to come to Pakistan since William's father Charles visited with his wife Camilla in 2006 AFP / Aamir QURESHI