Slow Horses Star Aimee-Ffion Edwards On Stunts, Spies And Why She Keeps Playing The Wildest Characters On TV

Aimee-Ffion Edwards is not someone who does things by halves. The Welsh actor, best known for playing the explosive MI5 agent Shirley Dander in Apple TV’s Slow Horses, has built a career out of taking on characters who lie, cheat, and generally cause chaos. And it turns out, a lot of that fearlessness comes from a pretty unexpected place.

“I played rugby for Wales,” she says, almost casually, as if that explains everything. “I was in a boys’ rugby team.” For Edwards, it kind of does explain everything. Growing up throwing herself into scrums with boys taught her early on that hesitation gets you nowhere. That attitude has clearly followed her into her acting career.

Nowhere was that more obvious than during filming for the latest series of Slow Horses, the critically acclaimed spy thriller based on Mick Herron’s novels. In one particularly intense scene, Edwards had to jump off a nightclub balcony. Not exactly a standard Tuesday on set.

“It was quite hard,” she admits. “You basically tell yourself, ‘You’re not jumping.’ Obviously you know you’re harnessed in, but you’re also going, ‘This is mad! This is mad! This is mad!'” She laughs recalling the moment. “I couldn’t feel my fingers for a second.” With around 200 people watching from the floor below, backing out was never really an option. She jumped.

That kind of commitment is exactly what has made her portrayal of Shirley Dander so compelling. Shirley is not your typical MI5 agent. She is traumatised, volatile, and has a well-documented habit of snorting cocaine in the office toilets between assignments. She is, in short, a mess. But she is also one of the most watchable characters on British television right now.

Edwards says she is drawn to characters who are fundamentally flawed. There is something about the liars, the crooks, and the sneaks that keeps pulling her in. Shirley fits that mould perfectly. Beneath all the chaos and bad decisions, there is a woman dealing with real trauma, trying to hold herself together in one of the most high-pressure jobs imaginable. Edwards plays that contradiction with a rawness that feels genuinely rare on screen.

Slow Horses itself has become one of the standout British dramas of recent years. Set in Slough House, a dumping ground for MI5 agents who have messed up their careers in various spectacular ways, the show has carved out a loyal following thanks to its sharp writing, dark humour, and a cast that includes Gary Oldman as the legendarily grumpy Jackson Lamb. Edwards holds her own in that company without breaking a sweat.

But Slow Horses is not the only big project on her plate. Edwards is also putting her own spin on one of the most iconic characters in cinema history, playing a Welsh version of Princess Leia. It is the kind of casting that sounds bizarre on paper but makes complete sense once you think about it. Leia is stubborn, brave, and refuses to be told what to do. Sound familiar?

For Edwards, the Welsh identity is important. She has spoken before about wanting to bring authentic Welsh voices and stories into mainstream television and film, rather than having Welshness used as a quirky backdrop or a punchline. Both Shirley and her take on Leia feel like extensions of that commitment.

What makes Edwards stand out in a crowded industry is that she does not seem particularly interested in playing it safe. Whether she is hurling herself off balconies, snorting fake cocaine for the cameras, or taking on a role carrying the weight of Star Wars mythology behind it, she approaches everything with the same energy. Full commitment, no hesitation.

Slow Horses returns to screens with Edwards back in full chaotic form as Shirley. If the balcony jump is anything to go by, this series is not going to hold back. Neither, it seems, is she.