One of Delevingne's longer and more serious relationships was with singer St. Vincent. The two met in December 2014 at one of the singer's U.S. tour stops and started dating shortly after, according to Grazia. The pair mainly kept their relationship under wraps, but were seen on a few different occasions in public, whether at a Burberry fashion show or the Brit Awards red carpet.
Despite their low-key relationship, the pair stayed strong. Delevingne, who is notoriously quiet about her romances, even gushed about her GF to Vogue in August 2016, saying, "I'm completely in love… Before, I didn't know what love was — real love. I didn't understand the depth of it. I always used to think it was you against the world. Now I know the meaning of life is love. Whether that's for yourself or for the world or your partner."
In an unexpected twist, the couple split up less than a month later in September 2016. According to The Sun, the model and St. Vincent allegedly split due to their packed schedules and the familiar pressures of a long-distance relationship. While some breakups can end on a bitter note, the two have had nothing but nice things to say about one another. The singer told Grazia shortly after, "Dating Cara was a big part of my life."