And, yes, his wife, Amelia Warner, spent some time on the "Fifty Shades" sets.
"Yeah, a couple of times on choice days," Dornan said. "There were some days where it probably doesn't make a lot of sense for her to be hanging around."
The franchise's second go-round, "Fifty Shades Darker," is due out in February. The third, "Fifty Shades Freed," is slated for February 2018.
Dornan wouldn't spill on season 3 of his popular BBC series, which is set in Belfast and has him playing Paul Spector, a bereavement counselor, married man and unassuming dad of two by day, stalker and slayer of women by night.
"You can expect the unexpected. There's quite remarkable turns in the third season that I really genuinely think people won't see coming that are hugely exciting," he said.
The series co-stars Gillian Anderson as Stella Gibson, the London detective sent to crack the case. She finds herself in a morbid game of cat and mouse with Spector, who - as far as we know - isn't quite as clever as he fancies himself, considering he wound up getting shot several times at the end of season 2.
The new season of "The Fall" is expected in the fall, according to some reports.
"You know, that job changed my life," Dornan said of the series. "They're like family to me and I'm forever grateful for it to be a part of my life and, you know, I would play that character to my dying days if I had the opportunity."
Does that include a fourth season?
"I don't know anything about that," he smiled.
(Originally published by CBS News on Friday, August 12, 2016 at 11:52 am ET)