The 'Burn' singer is a good friend of both Taylor and Calvin, and was the one who encouraged them to go on a date which has led to romance.
Ellie told The Sun: "I did play matchmaker, that's true. Calvin is a really great mate and he's so fantastic and Taylor is such a cool person who I love.
'I thought, 'They're both really awesome and both really tall, they'll be brilliant together!'"
And so they are!
Ellie caught up with Calvin at the Glamour Women of the Year Awards in London this week, where she was named Solo Artist of the Year and Calvin picked up Man of the Year.
She also appears in Taylor's new music video for 'Bad Blood'.
Meanwhile, all is going brilliantly in Ellie's own love life as she's happy with McFly star Dougie Poynter.
"He is definitely the one forever," she told ELLE UK. "He's been through a lot, and he has a quiet depth that I love. And you know what, when I was a teenager, I fancied him, but I thought he was out of my league. Way too good-looking for me."
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