Suki, 20, and Bradley, 39, crossed paths at the Elle Style Awards last February. "We were introduced and hit it off almost immediately," she said in an interview with Rollacoaster magazine.
"We were dancing at the after-party, and he asked me if I fancied going to a club. We went to Cirque Le Soir in London – and he's a ridiculously good dancer, yes," she added.
"But I'm a serious dancer too, so I don't know if I was fully concentrating on that. We make a pretty good duo though."
Suki also discussed why her romance with Bradley is rarely brought up in interviews. "Yes, I never get asked about it, because they all think I'm not going to answer them," she said.
Though the couple were rarely pictured together at the start of their relationship, Suki has been accompanying Bradley to a number of high-profile events as he promotes his latest film American Hustle.
The couple recently added the White House State dinner together
Most recently, she joined him at a White House state dinner on 11 February, where they dined alongside President Barack Obama and First Lady Michelle Obama.
Suki will soon cross over from fashion into the world of film when she stars in Love, Rosie, alongside Lily Collins, Sam Claflin, Tamsin Egerton and Jaime Winstone.
The London-born beauty, who made a brief appearance in the 2012 British crime thriller Pusher, also spoke about her burgeoning film career.
Suki with her Love, Rosie co-star Sam Claflin
"When I started modelling, I was young a sort of a bit reckless – I wanted to make money and didn't really care about anything else," she said.
"Now I'm far more settled, and acting has become really important to me again. In Love, Rosie, I'm the one who gets in-between Lily Collins and Sam – a kind of poison dart in the love story.
"It was an incredible experience," she added. "(Sam's) absolutely hilarious – so comfortable in himself. The bits with him were the easiest to play, for sure."