Taylor Swift is known for being close to her family so it is no surprise that her new love interest, Scottish DJ Calvin Harris, is already close with her brother. The 31-year-old artist was seen posing with his arm around Taylor's younger brother Austin at the Billboard Music Awards after party.
"Last night was a wild ride," tweeted Austin.
The tweet included three pictures which show Taylor, Calvin, and Austin partying with Ed Sheeran and One Direction boys Louis Tomlinson and Niall Horan.
The pics come just weeks after the Shake It Off singer introduced her new boyfriend to her friends, enlisting him to cook a barbecue for Ellie Goulding, Lorde and Empire actress Serayah.
Taylor and Calvin went public with their relationship at the annual Billboard Music Awards
The group documented their night in together on social media, with Ellie tweeting her thanks to Calvin for cooking her dinner. "Shoutout to @CalvinHarris for hooking me up with vegan bbq tonight," she wrote.
One of the three pictures posted by Austin on Tuesday also showed new lovebirds Taylor and Calvin smiling at each other with their heads bowed close to each other.
Their affection was clear, and came after the pair cuddled and kissed their way through the ceremony in Las Vegas - the first time they had gone public with their romance.
Taylor as her alter-ego Catastrophe
It was also a special night for Taylor professionally as well, as the 25-year-old scooped a number of coveted trophies, including Top Artist, Top Female Artist and Top Billboard Achievement.
Her success at the ceremony, and her romance with Calvin weren't the only major talking points; Sunday's ceremony also featured the debut of Taylor's music video for Bad Blood.
Taylor had been teasing her fans as she slowly unveiled the cast on Instagram over 11 days, and the final video starred the likes of Selena Gomez, Cara Delevingne, Cindy Crawford, Ellie Goulding and Jessica Alba.