The romance between Taylor Swift and Calvin Harris seems to still be in full throttle after one year of being together. The star couple recently celebrated their first year anniversary in a sweet way.

A Sweet Surprise

Despite both being Grammy award-winning millionaires, Taylor and Calvin decided to celebrate their big day in a simple but sweet manner. The couple shared their celebration on social media.

Harris posted a video on Snapchat of what appeared to be a handmade chocolate cake, which they may have baked together. The round dark brown cake was laid on a green plate with a glass cover which Harris took off. The top of the cake had two uneven red hearts with white borders and a big “1 YEAR” made of white icing was written at the center.

“One year! We got one year cake. We got one year cake,” Harris said while showing off the cake in the video. The shot then moved to Taylor, who nodded happily.

A Gold Locket

Swift revealed on Instagram that they actually had more than a cake to share on their anniversary. On Instagram, the singer featured a gold heart locket with with the date “3-6-2015” embossed on it, which is the date they became an official couple.

“One year down,” she captioned the photo.

A photo posted by Taylor Swift (@taylorswift) on Mar 6, 2016 at 3:03pm PST

An insider revealed that Harris planned to get Taylor a meaningful gift for their first year anniversary. The source said that Harris bought the gold locket on his own.

Calvin is usually not flashy when giving gifts and understands how Taylor appreciates small meaningful things. Harris thought that the small locket would be the perfect present. There is something special but secret inside the locket too, the insider added. Based on Taylor’s reaction in the video, it was obvious that she loved what her beau gave her.

A source also said that Taylor is a real hopeless romantic and thought that Calvin outdid himself with the gift. Harris reportedly had surprises for Taylor throughout the day. The source added that Calvin knows that Taylor is the woman for him.

Considering how Harris has been in a lot of relationships before, he seems to be happiest with Taylor. He allegedly tells all his friends that Taylor is marriage material.

Swift and Harris first met in February 2015 at the Elle Style Awards. Ellie Goulding introduced the country singer to the Scottish DJ at the time.