Michael Fassbender and Alicia Vikander had instant chemistry the first time they met.
The pair - who play lighthouse keeper Tom and his wife Isabel Sherbourne in drama movie 'The Light Between Oceans' - met on a dance floor and despite the 39-year-old actor's poor moves, he admits there was an immediate spark.
Alicia said: "We had met at Toronto Film Festival and just on the dance floor."
Michael added: "I thought [I was a good dancer] until she started dancing and then I felt like I had two left feet.
"[The chemistry] was sort of there from the beginning."
After that the pair got close while filming 'The Light Between Oceans' and often threw some shapes together in the mornings on set to keep warm.
The 27-year-old beauty said: "There was a load of dancing in the mornings, actually."
Michael said: "Because it was cold."
The 'Shame' star praised his girlfriend for her performance in the movie, insisting she pushed herself to her limits during filming.
He added to 'Entertainment Tonight': "She's a very fierce performer and very brave as you're testing the boundaries for how far you can go. She definitely got a hold of those things.
"It's impressive to see."
Michael and Alicia reportedly split in September after nine months together, but they are now very much back together.
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