They may play each other's mortal enemies on the actual show, but thankfully co-stars Gillian Anderson and Jamie Dornan get on like a house on fire in real life.
Gillian shared this sweet selfie of the pair from yesterday as they wrapped the very last season of the Fall.
Yep, the seminal crime drama is to return to RTE for the third and final series later this year.
"Jamie Dornan, sweetest man alive, just wrapped season 3 of The Fall," read Gillian's cute caption.
"You'll never meet a nicer serial killer."
Jamie plays Paul Spector, a Northern Irish serial killer while Gillian plays a seductive yet troubled detective pursuing him in the hit drama series set in Belfast.
But don't worry, we will be seeing much more from these two in the near future.
Gillian has reprised the role of Dana Scully in the hotly anticipated reboot of the X-Files which returned to our screens this week.
Meanwhile, Jamie is currently starring as Christian Grey in the steamy 50 Shades of Grey franchise. The next installment is due out in early 2017.