In December 2018, Luke sparked relationship rumours with Australian actress Olympia Valance after she shared a steamy pic of him in a towel on her Instagram Story with the caption, "What's not to love?" Not long after, the two were spotted looking cosy at the Australian Open, and in February 2019, Olympia confirmed their romance. "He's very supportive. I'm very happy," Olympia told WHO. It's unclear when the couple split, but by the summer of 2019, Olympia was boo'd up with AFL star Thomas Bellchambers, to whom she's now engaged.